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TPSM843B22

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4-V to 18-V input, advanced current mode, 20-A synchronous SWIFT™ step-down power module

Product details

Iout (max) (A) 20 Vin (min) (V) 4 Vin (max) (V) 18 Vout (min) (V) 0.5 Vout (max) (V) 7 Soft start Adjustable Features Adjustable Switch Frequency, Adjustable current limit, Enable, External Sync, Frequency synchronization, Over Current Protection, Overvoltage protection, Power good, Soft Start Adjustable, Temperature sensing, Under Voltage Protection, Under voltage lock out Operating temperature range (°C) -40 to 125 Regulated outputs (#) 1 Switching frequency (max) (kHz) 2200 Switching frequency (min) (kHz) 500 Duty cycle (max) (%) 100 Topology Buck, Synchronous Buck Type Module Rating Catalog Control mode ACM
Iout (max) (A) 20 Vin (min) (V) 4 Vin (max) (V) 18 Vout (min) (V) 0.5 Vout (max) (V) 7 Soft start Adjustable Features Adjustable Switch Frequency, Adjustable current limit, Enable, External Sync, Frequency synchronization, Over Current Protection, Overvoltage protection, Power good, Soft Start Adjustable, Temperature sensing, Under Voltage Protection, Under voltage lock out Operating temperature range (°C) -40 to 125 Regulated outputs (#) 1 Switching frequency (max) (kHz) 2200 Switching frequency (min) (kHz) 500 Duty cycle (max) (%) 100 Topology Buck, Synchronous Buck Type Module Rating Catalog Control mode ACM
B3QFN (RDG) 25 48.75 mm² 7.5 x 6.5
  • Fixed-frequency, internally compensated advanced current mode (ACM) control
  • Integrated 6.5-mΩ and 2-mΩ MOSFETs, Inductor and basic passives
  • 4-V to 18-V input voltage range
  • 0.5-V to 7-V output voltage range
  • True differential remote sense amplifier (RSA)
  • Three selectable PWM ramp options to optimize the control loop performance
  • Five selectable switching frequencies: 500 kHz, 750 kHz, 1 MHz, 1.5 MHz, and 2.2 MHz
  • Synchronizable to an external clock
  • 0.5 V, ±0.5% voltage reference accuracy over full temperature range
  • 1-ms, 2-ms, 4-ms, and 8-ms selectable soft-start times
  • Monotonic start-up into prebiased outputs
  • Enable with adjustable input undervoltage lockout
  • Power-good output monitor
  • Output overvoltage, output undervoltage, input undervoltage, overcurrent, and overtemperature protection
  • –40°C to 125°C operating junction temperature
  • 6.5-mm × 7.5-mm × 4.0-mm, 25-pin over-molded QFN package
  • Lead-free (RoHS compliant)
  • Pin compatible with the 16 A - TPSM843A26 and 12 A - TPSM843A22
  • Fixed-frequency, internally compensated advanced current mode (ACM) control
  • Integrated 6.5-mΩ and 2-mΩ MOSFETs, Inductor and basic passives
  • 4-V to 18-V input voltage range
  • 0.5-V to 7-V output voltage range
  • True differential remote sense amplifier (RSA)
  • Three selectable PWM ramp options to optimize the control loop performance
  • Five selectable switching frequencies: 500 kHz, 750 kHz, 1 MHz, 1.5 MHz, and 2.2 MHz
  • Synchronizable to an external clock
  • 0.5 V, ±0.5% voltage reference accuracy over full temperature range
  • 1-ms, 2-ms, 4-ms, and 8-ms selectable soft-start times
  • Monotonic start-up into prebiased outputs
  • Enable with adjustable input undervoltage lockout
  • Power-good output monitor
  • Output overvoltage, output undervoltage, input undervoltage, overcurrent, and overtemperature protection
  • –40°C to 125°C operating junction temperature
  • 6.5-mm × 7.5-mm × 4.0-mm, 25-pin over-molded QFN package
  • Lead-free (RoHS compliant)
  • Pin compatible with the 16 A - TPSM843A26 and 12 A - TPSM843A22

The TPSM843B22 is a high-efficiency 18-V, 20-A synchronous buck module employing an internally compensated, fixed-frequency advanced current mode (ACM) control architecture, which while always operating under FCCM, generates output voltages from 0.5 V to 7 V. The module is capable of providing high efficiency while operating at a switching frequency up to 2.2 MHz. The module is in a 6.5-mm x 7.5-mm x 4-mm over-molded package, which makes it optimal for designs requiring a small solution size. Additional features include a high accuracy voltage reference, selectable soft-start times, monotonic start-up into prebiased outputs, selectable current limits, adjustable UVLO through the EN pin, and a full suite of fault protections.

The TPSM843B22 is a high-efficiency 18-V, 20-A synchronous buck module employing an internally compensated, fixed-frequency advanced current mode (ACM) control architecture, which while always operating under FCCM, generates output voltages from 0.5 V to 7 V. The module is capable of providing high efficiency while operating at a switching frequency up to 2.2 MHz. The module is in a 6.5-mm x 7.5-mm x 4-mm over-molded package, which makes it optimal for designs requiring a small solution size. Additional features include a high accuracy voltage reference, selectable soft-start times, monotonic start-up into prebiased outputs, selectable current limits, adjustable UVLO through the EN pin, and a full suite of fault protections.

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Technical documentation

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Type Title Date
* Data sheet TPSM843B22 4-V to 18-V Input, 20-A, Buck Power Module with Internally Compensated, Advanced Current Mode Control datasheet (Rev. B) PDF | HTML 18 Jul 2023
Application brief Solving Power Design Challenges in Medical Imaging Applications PDF | HTML 12 Jul 2023
EVM User's guide TPSM843B22EVM Step-Down Module Evaluation Module User's Guide PDF | HTML 17 Apr 2023
Certificate TPSM843B22EVM EU RoHS Declaration of Conformity (DoC) (Rev. A) 11 Apr 2023

Design & development

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Evaluation board

TPSM843B22EVM — TPSM843B22 synchronous buck evaluation module

The TPSM843B22 evaluation module (EVM) is a synchronous buck power module designed to provide up to a 20 A output and is rated for 4 V to 18 V. The high-side and low-side MOSFETs are incorporated inside the TPSM843B22 package along with the gatedrive circuitry, inductor and basic (...)

User guide: PDF | HTML
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Simulation model

TPSM843B22 SIMPLIS Model

SLUM868.ZIP (1353 KB) - SIMPLIS Model
Calculation tool

TPSM843B22-A26-A22-CALC CALC-TPSM843B22-A26-A22

TPSM843B22 TPSM843A22 TPSM843A26 Calculator
Supported products & hardware

Supported products & hardware

Products
Buck modules (integrated inductor)
TPSM843A22 4-V to 18-V input, advanced current mode, 12-A synchronous SWIFT™ step-down power module TPSM843B22 4-V to 18-V input, advanced current mode, 20-A synchronous SWIFT™ step-down power module TPSM843A26 4-V to 18-V input, advanced current mode, 16-A synchronous SWIFT™ step-down power module
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Package Pins Download
B3QFN (RDG) 25 View options

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