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LM5122MH

Texas Instruments

-40℃~+125℃@(TJ) 1 4.5V~65V 400kHz~1MHz Adjustable Boost Boost External Yes HTSSOP-20-EP DC-DC Converters ROHS

Extended
DatasheetJLCPCBLCSCti/LM5122MH
Category
DC DC Converters
Package
HTSSOP-20-EP
Pins
21

Overview

The LM5122MH is a DC DC Converter made by Texas Instruments in a HTSSOP-20-EP package with 21 pins. -40℃~+125℃@(TJ) 1 4.5V~65V 400kHz~1MHz Adjustable Boost Boost External Yes HTSSOP-20-EP DC-DC Converters ROHS.

PCBKit's library has its KiCad symbol (EasyEDA_Cloud:LM5122MH_NOPB, from EasyEDA) and its footprint (EasyEDA_Cloud:HTSSOP-20_L6.5-W4.4-P0.65-LS6.4-BL-EP, from EasyEDA), ready for a KiCad board. 62 are in stock at JLCPCB (part C2859988). 2 open-source boards in 2 repositories on GitHub use it.

Symbol

SYNCOUT1OPT2CSN3CSP4VIN5UVLO6SS7SYNCIN/RT8AGND9FB10COMP11SLOPE12MODE13RES14PGND15LO16VCC17SW18HO19BST20EP21
EasyEDA_Cloud:LM5122MH_NOPBFrom EasyEDA

Footprint

12345678910111213141516171819202121212121
EasyEDA_Cloud:HTSSOP-20_L6.5-W4.4-P0.65-LS6.4-BL-EPFrom EasyEDA

Parameters

11
Features
Light load efficient mode
Frequency - Switching
400kHz~1MHz
Function
Boost
Number of Outputs
1
Operating Temperature
-40℃~+125℃@(TJ)
Output Type
Adjustable
Quiescent Current
3.5mA
Switch tube (built-in/external)
External
Synchronous Rectifier
Yes
Topology
Boost
Voltage - Supply
4.5V~65V

Order codes

1

Pinout

21
The pins of the LM5122MH
PinNameType
1SYNCOUTUnspecified
2OPTUnspecified
3CSNUnspecified
4CSPUnspecified
5VINUnspecified
6UVLOUnspecified
7SSUnspecified
8SYNCIN/RTUnspecified
9AGNDUnspecified
10FBUnspecified
11COMPUnspecified
12SLOPEUnspecified
13MODEUnspecified
14RESUnspecified
15PGNDUnspecified
16LOUnspecified
17VCCUnspecified
18SWUnspecified
19HOUnspecified
20BSTUnspecified
21EPUnspecified

Open-source boards using it

All 2
  • 2 layers220 × 130 mmMrf101 40m pa usbpd, the printed circuit board in 3D

    Mrf101 40m pa usbpd

    ablanquart/thegrenade_2026

    USB-C powered linear amplifier for 40M band with harmonic rejection and SMA ports

    96 partsCERN-OHL-S-2.0
  • 4 layers66.7 × 39 mmPower, the printed circuit board in 3D

    Power

    KRuskowski/s5

    einheit s5 (S501) — 5-port managed PoE switch on Allwinner T113-S3

    62 parts

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Questions

Is there a KiCad symbol and footprint for the LM5122MH?

Yes. The symbol is EasyEDA_Cloud:LM5122MH_NOPB and the footprint EasyEDA_Cloud:HTSSOP-20_L6.5-W4.4-P0.65-LS6.4-BL-EP, both drawn on this page. PCBKit places them on a board for you when you design with it.

What package is the LM5122MH?

HTSSOP-20-EP, with 21 pins. Its footprint is drawn on this page.

Where is the LM5122MH datasheet?

Texas Instruments publishes it: the Datasheet link on this page opens it.

Where can I order the LM5122MH?

JLCPCB lists it as part C2859988, with 62 in stock; the sellers' links on this page open their listings.

What can replace the LM5122MH?

Parts like it in the library: the LM5116MHX by Texas Instruments, the LM5122MHX by Texas Instruments, the LM5576MHX by Texas Instruments and the LM25117PMHX by Texas Instruments. Check their datasheets: a part that fits the footprint may still differ in its ratings.

Which open-source boards use the LM5122MH?

2 boards in 2 repositories on GitHub; the most starred are listed on this page, with their KiCad files.

Parts like it

8