TPSM843521中文资料3.8V 至 18V 输入、5A、200kHz 至 2.2MHz 同步降压电源模块数据手册TI规格书

描述 Description

The TPSM843521 is a high-efficiency, high-power density, and easy-to-use, synchronous buck power module with high design flexibility. With operating input voltage ranging from 3.8V to 18V, the TPSM843521 is designed for systems powered from 5V, 12V power-bus rails. The device supports up to 5A continuous output current and 98% maximum duty cycle.

TPSM843521 uses fixed frequency peak current control with internal compensation for fast transient response and good line and load regulation. With the optimized internal loop compensation, the device eliminates the need for external compensation over a wide output voltage range and switching frequency.

TPSM843521 allows high design flexibility with wide supported switching frequency of 200kHz – 2.2MHz set by the RT/SYNC pin. The device has the option for pulse frequency modulation (PFM), forced continuous conduction modulation (FCCM) at light load condition, and adjustable soft-start (SS) time / power-good (PG) indicator with different configuration of the MODE pin.

TPSM843521 provides protection functions including thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, and hiccup short-circuit protection. TPSM843521 is available in a 9-pin, 3.3mm × 4.5mm, QFN package, and the pinout is available for single-layer PCB layout. The junction temperature is specified from –40°C to 125°C.

特性 Features

Configured for a wide range of applications

3.8V to 18V input voltage range

0.6V to 9V output voltage range

Up to 5A continuous output current

0.6V ±1% reference voltage (–40°C to 125°C)

Low quiescent current of 28uA (typical)

70ns, 114ns minimum switching on, off-time

8us maximum switching on-time

98% maximum duty cycle



Ease of use and small design size

Peak current control mode with internal compensation

200kHz to 2.2MHz selectable frequency

Synchronizable to an external clock (support phase shift): 200kHz to 2.2MHz

Selectable PFM / FCCM at light load condition

Selectable adjustable soft-start time, power-good indicator function

Good EMI performance with frequency spread spectrum and optimized pinout

Hiccup overcurrent (OC) limit for both high-side and low-side MOSFETs

Non-latched protections for overtemperature protection (OTP), overcurrent protection (OCP), overvoltage protection (OVP), undervoltage protection (UVP), and undervoltage lockout (UVLO)

Integrated bootstrap capacitor and inductor to support easy PCB layout

Operating junction temperature of –40°C to 125°C

3.3mm × 4.5mm × 2mm QFN package



Create a custom design with the TPSM843521 using the WEBENCH Power Designer