Can I request technical information for LTC3638HMSE#TRPBF?

Yes. Contact our team for datasheets, package information, product specifications, alternative parts and sourcing support related to LTC3638HMSE#TRPBF.

cart ()

LTC3638HMSE#TRPBF Analog Devices Inc. product image

SOURCING SUPPORT

Need Help With LTC3638HMSE#TRPBF?

Contact our sourcing team for current stock, batch information, lead time, technical documents, alternative parts and volume pricing.

Stock & Batch Verification Confirm available quantity, date code and delivery schedule.

Alternative Part Sourcing Request compatible or replacement parts when stock is limited.

Quality & Packaging Check Confirm product condition, packaging type and shipment protection before dispatch.

Submit RFQ Contact Sales

: Supplier Verification
Supplier review and component quality inspection support.

: Technical Documents
Datasheet and specification confirmation for engineers.

: One-Stop BOM Sourcing
Multi-part procurement and shortage sourcing assistance.

Analog Devices Inc. RFQ AVAILABLE

LTC3638HMSE#TRPBF

IC REG BUCK ADJ 250MA 16MSOP

Part Number: LTC3638HMSE#TRPBF

Manufacturer: Analog Devices Inc.

Category: Voltage Regulators - DC DC Switching Regulators

Package: 16-TFSOP (0.118", 3.00mm Width), 12 Leads, Exposed Pad

Datasheet:: LTC3638HMSE#TRPBF.pdf

Description: IC REG BUCK ADJ 250MA 16MSOP

Select Quantity Stock: 13,315

Request RFQ Add to RFQ List

Part Number

Quantity *

Target Price

Name *

Company *

Email *

Comments

Compare Favorite

PRODUCT INFORMATION

Product Details

PRODUCT TECHNICAL REFERENCE

LTC3638HMSE#TRPBF High Efficiency, 140V, 250mA Step-Down Regulator with 12µA Quiescent Current

A comprehensive technical overview of the LTC3638HMSE#TRPBF, a high-efficiency step-down DC/DC regulator from Analog Devices featuring an internal power switch, a 4V to 140V input voltage range, up to 250mA output current, 12µA typical quiescent current, Burst Mode® operation, and a thermally enhanced 16-lead MSOP package (12 leads plus exposed pad). The H-grade version is specified for a –40°C to 150°C operating junction temperature range. Covers device function, core features, electrical specifications, pin configuration, typical applications, and replacement selection guidance.

Analog Devices 16-MSOP-EP (12 Leads + EP) 4V to 140V

Device Classification High-Voltage Step-Down DC/DC Regulator

Part Number: LTC3638HMSE#TRPBF

Mounting Type: Surface Mount

Operating Temperature Range: -40°C to +150°C (T_J)

PRODUCT OVERVIEW

What Is the LTC3638HMSE#TRPBF?

LTC3638HMSE#TRPBF is a high-efficiency step-down DC/DC regulator from Analog Devices with an internal high-side power switch, designed to draw only 12µA of typical DC supply current while maintaining a regulated output voltage at no load[reference:0]. The device is part of the LTC3638 family, which is recommended for new designs and is particularly suited for always-on and battery-powered systems where low quiescent current is critical[reference:1].

The regulator operates over a wide 4V to 140V input voltage range, accommodating a broad spectrum of high-voltage power sources including industrial buses, telecom rails, and automotive systems[reference:2]. It can supply up to 250mA of load current, with a programmable peak current limit that allows optimization of efficiency, output ripple, and component size. The maximum output current can be adjusted from 20mA to 250mA via a single external resistor on the I_SET pin[reference:3].

The LTC3638 uses Burst Mode® operation, an integrated power switch, low quiescent current, and programmable peak current limiting to achieve high efficiency across a broad range of load currents[reference:4]. The device requires no external compensation and supports 100% duty cycle low dropout operation. A precise RUN pin threshold and internal/external soft-start guarantee well-controlled power system start-up, while a feedback comparator output enables multiple LTC3638 devices to be paralleled for higher current applications[reference:5].

The LTC3638HMSE#TRPBF is the H-grade version in a thermally enhanced 16-lead MSOP package with four pins removed (12 active leads plus an exposed pad). It is specified for operation over a –40°C to +150°C junction temperature range, making it suitable for automotive and other high-temperature environments[reference:6]. The device is RoHS compliant, REACH unaffected, and in active production.

4V to 140V Wide Input Range Internal low-resistance power MOSFET with no compensation required and 100% duty cycle low dropout operation.

12µA Quiescent Current Burst Mode® operation maintains high efficiency at light loads, with programmable peak current limit from 20mA to 250mA for design flexibility.

H-Grade (–40°C to +150°C) Thermally enhanced high-voltage MSOP package with exposed pad, specified for automotive and harsh-environment operation.

DEVICE HIGHLIGHTS

Key Features and Benefits of LTC3638HMSE#TRPBF

Wide 4V to 140V Input Range

Operates from 4V to 140V input with an internal low-resistance power MOSFET, supporting high-voltage industrial, telecom, avionics, and automotive power sources.

Ultra-Low Quiescent Current (12µA)

12µA typical DC supply current in no-load regulation enables always-on and battery-powered systems to conserve energy during standby.

Programmable Peak Current Limit (20mA to 250mA)

A single resistor on the I_SET pin sets the peak current limit, providing a simple method to optimize efficiency and reduce output ripple and component size.

No Compensation & 100% Duty Cycle

The internal control loop requires no external compensation, and 100% duty cycle low dropout operation maximizes usable input voltage range.

Paralleling & Programmable Output

A feedback comparator output (FBO) enables multiple LTC3638s to be paralleled for higher current. Output voltage is programmable to 1.8V, 3.3V, 5V, or adjustable via VPRG1/VPRG2 pins.

Precise RUN & OVLO Protection

Precise RUN pin threshold and programmable input overvoltage lockout (OVLO) ensure controlled start-up and robust protection against input transients.

REFERENCE DATA

Technical Specifications for LTC3638HMSE#TRPBF

Part Number	LTC3638HMSE#TRPBF	Manufacturer	Analog Devices
Device Type	Step-Down DC/DC Regulator	Topology	Buck
Input Voltage Range (V_IN)	4V to 140V	Output Voltage Range (V_OUT)	0.8V to V_IN (Adjustable)
Output Current (Max)	250mA	Programmable Peak Current Limit	20mA to 250mA
Quiescent Current (I_Q)	12µA (Typical, No Load)	Shutdown Current	1.4µA (Typical)
Feedback Voltage Reference	0.8V ±1%	Compensation	Not Required
Duty Cycle (Max)	100% (Low Dropout Operation)	Operating Mode	Burst Mode®
Soft-Start	Internal (1ms Default) or External Capacitor	Output Voltage Programming	1.8V, 3.3V, 5V, or Adjustable via VPRG1/VPRG2
RUN Pin Threshold	1.21V Rising, 0.7V Falling	OVLO Pin Threshold	1.21V Rising, 1.10V Falling
Paralleling Capability	Yes (via FBO Pin)	Integrated Power Switch	Yes
Package / Case	16-Lead MSOP with Exposed Pad (12 Leads + EP)	Supplier Device Package	MSE16 (12)
Pin Count	12 Active Leads + Exposed Pad	Mounting Type	Surface Mount
Operating Junction Temperature (H-Grade)	-40°C to +150°C	RoHS	ROHS3 Compliant
REACH Status	REACH Unaffected	MSL Level	MSL 1 (Unlimited)
ECCN	EAR99	Product Status	Active
Packaging	Tape & Reel (2,500 per Reel)	Grade	H-Grade
Synchronous Rectifier	No (Internal High-Side Switch Only)	External Catch Diode	Required

Electrical values shown above are reference values. Test conditions, limits, and guaranteed performance should always be confirmed from the current official manufacturer datasheet before design or production use.

DESIGN REFERENCE

Circuit Considerations for LTC3638HMSE#TRPBF

Output Voltage & Current Limit Programming

The LTC3638HMSE#TRPBF offers flexible configuration for output voltage and current limit:

Output Voltage (VPRG1/VPRG2 Pins): Select a fixed 5V output by connecting VPRG1 to SS and VPRG2 to GND. For 3.3V, connect VPRG1 to GND and VPRG2 to SS. For 1.8V, connect both VPRG1 and VPRG2 to SS. For an adjustable output, short both pins to GND and use an external resistor divider from V_OUT to the V_FB pin[reference:7].
Peak Current Limit (I_SET Pin): A resistor from I_SET to GND sets the peak current comparator threshold. Leave the pin floating for maximum peak current (575mA typical) or short to GND for minimum peak current (60mA typical). The maximum output current is one-half the peak current[reference:8].
Soft-Start (SS Pin): A capacitor to ground sets the output voltage ramp time (1ms per 6.25nF). If left floating, an internal 1ms soft-start is used[reference:9].
Paralleling (FBO Pin): The feedback comparator output (FBO) can be connected to the V_FB pins of additional LTC3638 devices to combine output current for higher-power applications[reference:10].

PCB and System-Level Guidance

High-voltage buck regulator performance depends on layout and component selection:

Input Capacitor: Tie a ceramic bypass capacitor between the V_IN pin and GND, placed as close as possible to the device[reference:11].
Catch Diode: An external catch diode is required for the non-synchronous topology. Connect the cathode to SW (Pin 1) and the anode to GND.
Inductor Selection: Choose the inductor based on the programmed peak current limit, switching frequency, and acceptable output ripple.
RUN and OVLO Dividers: Use resistor dividers from V_IN to RUN (Pin 14) and OVLO (Pin 12) to set precise undervoltage and overvoltage lockout thresholds. Tie OVLO to GND if overvoltage protection is not used[reference:12].
Exposed Pad: The exposed pad (Pin 17) must be soldered to the PCB ground plane for rated thermal performance[reference:13].
Verify the recommended PCB footprint from the official datasheet prior to production.

16-LEAD MSOP-EP (12 LEADS + EXPOSED PAD)

Pin Configuration Reference for LTC3638HMSE#TRPBF

LTC3638

MSOP TOP VIEW

Confirm package orientation and pin numbering against the official package drawing before PCB layout. The MSE16 package has 16 lead positions with four pins removed (12 active leads) plus an exposed thermal pad (Pin 17). The exposed pad must be soldered to the PCB ground plane for rated thermal performance.

1 SW Switch Node - Connect to Inductor and Catch Diode Cathode; Connects to Internal Power MOSFET Drain

3 V_IN Main Supply Input - 4V to 140V; Bypass with Ceramic Capacitor to GND

5 FBO Feedback Comparator Output - Connect to V_FB Pins of Additional LTC3638s for Paralleling

6 V_PRG2 Output Voltage Selection - Connect to GND or SS per Output Voltage Configuration

7 V_PRG1 Output Voltage Selection - Connect to GND or SS per Output Voltage Configuration

8 GND Ground - Connect to PCB Ground Plane

9 V_FB Output Voltage Feedback - Connect to External Resistor Divider for Adjustable Output, or Directly to Output for Fixed Output

10 SS Soft-Start Control - Capacitor to GND Sets Ramp Time (1ms per 6.25nF); Internal 1ms if Floating

11 I_SET Peak Current Set Input - Resistor to GND Sets Peak Current; Float for Maximum (575mA), Short to GND for Minimum (60mA)

12 OVLO Overvoltage Lockout Input - Resistor Divider from V_IN; Above 1.21V Disables Switching; Tie to GND if Unused

14 RUN Run Control Input - Above 1.21V Enables Operation; Below 0.7V Shuts Down (1.4µA); Resistor Divider for UVLO

16 GND Ground - Connect to PCB Ground Plane

17 EP Exposed Pad - Must Be Soldered to PCB Ground Plane for Rated Thermal Performance

APPLICATION AREAS

Typical Applications for LTC3638HMSE#TRPBF

Industrial Control Supplies

4V to 140V input range and robust protection features suit industrial control systems and factory automation power supplies.

Medical Devices

Low 12µA quiescent current and high efficiency make this regulator ideal for portable and implantable medical devices requiring long battery life.

Distributed Power Systems

High-voltage input capability and paralleling support enable use in distributed power architectures for telecom and datacom equipment.

Battery-Operated Devices

12µA no-load quiescent current and Burst Mode® operation extend battery life in portable instruments and battery-powered systems.

Avionics

The H-grade –40°C to +150°C junction temperature range and wide input voltage capability support avionics and aerospace power systems.

Automotive

AEC-Q100-qualified H-grade operation and robust high-voltage protection suit automotive electronic control units and power modules.

REPLACEMENT GUIDANCE

Selecting an Alternative for LTC3638HMSE#TRPBF

A replacement for the LTC3638HMSE#TRPBF should not be selected solely by product category. The electrical characteristics, package, and pin configuration must be evaluated against the specific circuit requirements. The following alternatives are documented in the official Analog Devices product pages and datasheets.

Topology: Step-Down Buck

Input voltage: 4V–140V

Output current: 250mA

Quiescent current: 12µA

Package: 16-MSOP-EP (12 Leads)

Temperature range: –40°C to 150°C (H-Grade)

Burst Mode® operation

No external compensation required

Pin-to-pin and functionally compatible alternatives (same family, different temperature grade or packaging):

Part Number	Temperature Range	Grade	Packaging
LTC3638HMSE#TRPBF	–40°C to +150°C	H-Grade	Tape & Reel
LTC3638HMSE#PBF	–40°C to +150°C	H-Grade	Tube
LTC3638IMSE#TRPBF	–40°C to +125°C	I-Grade	Tape & Reel
LTC3638EMSE#TRPBF	–40°C to +125°C	E-Grade	Tape & Reel
LTC3638MPMSE#TRPBF	–55°C to +150°C	MP-Grade	Tape & Reel

All alternative part numbers listed above are documented in the official Analog Devices product pages and datasheets. The LTC3638HMSE#TRPBF is the H-grade (–40°C to +150°C) version in a 16-lead MSOP package with an exposed pad and tape-and-reel packaging (2,500 units per reel). For tube packaging in the same grade, consider LTC3638HMSE#PBF. For I-grade (–40°C to +125°C) operation, consider LTC3638IMSE#TRPBF. For E-grade operation, consider LTC3638EMSE#TRPBF. For MP-grade (–55°C to +150°C) operation, consider LTC3638MPMSE#TRPBF. For higher output current (400mA) in a similar family, consider the LTC7138[reference:14]. Select based on temperature grade, current requirement, and packaging needs.

Alternative Part Support

Send the original part number, application, required quantity, and key parameters to Haishengye Electronics for replacement-part sourcing support.

Ask About Alternatives

MANUFACTURER INFORMATION

Analog Devices

The LTC3638 (LTC3638HMSE#TRPBF) belongs to the LTC3638 family of high-efficiency, high-voltage step-down DC/DC regulators from Analog Devices (originally Linear Technology). The device features an internal high-side power switch, a wide 4V to 140V input voltage range, up to 250mA output current, and an ultra-low 12µA typical quiescent current. Burst Mode® operation, a programmable peak current limit, and a no-compensation architecture provide high efficiency across a broad range of load currents. The LTC3638 is available in a thermally enhanced 16-lead MSE package with four pins removed and an exposed pad, and is offered in E-grade, I-grade, H-grade, and MP-grade temperature versions. It is recommended for new designs in industrial control, medical devices, distributed power systems, portable instruments, battery-operated devices, avionics, and automotive applications[reference:15].

SUPPLIED BY

Haishengye Electronics

Haishengye Electronics provides electronic component stock supply, BOM sourcing, quotation support, and quality inspection services for LTC3638HMSE#TRPBF and related devices.

Submit Your Requirements

Technical Information Disclaimer

This technical guide is provided for product identification and preliminary reference only. Electrical limits, package dimensions, pin configuration, product status, and application suitability must be verified using current official manufacturer documentation before design, procurement, or production.

TECHNICAL RESOURCES

LTC3638HMSE#TRPBF Technical Information

Specifications
FAQ
Hot Sale
Packaging
Related Products

Specifications

Product Attribute: Attribute Value

Part Number: LTC3638HMSE#TRPBF

Manufacturer: Analog Devices Inc.

Package: 16-TFSOP (0.118", 3.00mm Width), 12 Leads, Exposed Pad

Series: -

Package/Case: 16-TFSOP (0.118", 3.00mm Width), 12 Leads, Exposed Pad

Packaging: Tape & Reel (TR)

Product Status: Active

Function: Step-Down

Output Configuration: Positive

Topology: Buck

Output Type: Adjustable

Number of Outputs: 1

Voltage - Input (Min): 4V

Voltage - Input (Max): 140V

Voltage - Output (Min/Fixed): 0.8V

Voltage - Output (Max): 140V

Current - Output: 250mA

Frequency - Switching: -

Synchronous Rectifier: No

Operating Temperature: -40°C ~ 150°C (TJ)

Grade: -

Qualification: -

Mounting Type: Surface Mount

Supplier Device Package: 16-MSOP-EP

Frequently Asked Questions

1. How can I order LTC3638HMSE#TRPBF from Haishengye Electronics?

Submit an RFQ directly on this page with your required quantity, target price and delivery requirements. Our sales team will review the request and provide a quotation.

2. How does Haishengye Electronics verify the quality of LTC3638HMSE#TRPBF?

We work with qualified suppliers and review sourcing channels, traceability, packaging and product condition before shipment.

3. Are the stock and price of LTC3638HMSE#TRPBF updated in real time?

Electronic component inventory and prices may change frequently. Displayed values are references, and final stock and pricing will be confirmed in the quotation.

4. Which payment methods are supported?

Wire Transfer, PayPal, Alipay, WeChat, Credit Card, Western Union, MoneyGram and Escrow may be supported depending on the order and destination.

5. How is international shipping arranged?

International shipping may be arranged through DHL, UPS, FedEx, TNT and other logistics channels. Tracking information will be provided after shipment.

6. What is the return or replacement process for LTC3638HMSE#TRPBF?

Contact our sales team within the agreed period if there are quantity differences, incorrect items or clear external defects. Products should remain unused and in their original packaging.

7. Can I request technical support for LTC3638HMSE#TRPBF?

Yes. Contact our team for datasheets, package details, product specifications, alternative parts and sourcing assistance.

Hot Sale Part Numbers

ADXL357BEZ LT3045HDD#TRPBF LT3480MPMSE LTC3638MPMSE#TRPBF STA309A13TR ADS1282HPW LTC3805HMSE#TR LTC2851HMS8 74AHC245PW,112 ADS1282HKV/EM LT301001C ADS1294IPAGR LT3010MPMS8E MP8795HGLE-P SN74LVC8T245PWRG4 DAC8811IBDGKTG4 88E1543-A1-LKJ2C000 PTVS30VP1UP-QX LTC3787MPGN LTC6995IDCB-2 UCC33020QRAQRQ1 88E1512-A0-NNP2C000 88E1145-E1-BBM1I000 UCC 74HCT08D TPS563201DDCT TMS5703135CPGEQQ1 DAC8811ICDGKR LT3090MPMSE LTC3646IDE-1

Packaging and Shipping Protection

Step 1 Product Inspection

Step 2 Casing & Dry Pipe

Step 3 Anti-static Bags

Step 4 Inner Carton

Step 5 Shipping Label

Step 6 International Delivery

Packaging may be adjusted according to product type, quantity, moisture sensitivity and destination requirements.

LTC3638HMSE#TRPBF Procurement and Technical Support

LTC3638HMSE#TRPBF is manufactured by Analog Devices Inc.. This page provides purchasing information including manufacturer, category, package, datasheet, stock reference, price reference and product specifications.

Haishengye Electronics supports customers sourcing LTC3638HMSE#TRPBF and related electronic components for prototype development, maintenance, NPI, production preparation and one-stop BOM procurement.

Submit an RFQ to request the latest stock, price, lead time, batch information, alternative parts, package confirmation or technical documents for LTC3638HMSE#TRPBF.

Part Number: LTC3638HMSE#TRPBF

Manufacturer: Analog Devices Inc.

Package: 16-TFSOP (0.118", 3.00mm Width), 12 Leads, Exposed Pad

Category: Voltage Regulators - DC DC Switching Regulators

Submit BOM RFQ Contact Sales

Payment Method

PayPal Bank Transfer VISA Mastercard Western Union

Transaction fees are charged according to the selected bank or payment system rules.

Shipping Method

DHL

FedEx

UPS

TNT

Shipped From

Shenzhen warehouse

Dispatch Time

Usually 1–3 business days after confirmation

Lead Time

Shipping Fee

Calculated according to destination and parcel weight

Get Shipping Estimate

Submitting...

Please wait while we submit your inquiry.

Comparison List

Clear All