TPSM82810 Texas instruments

TPSM82810

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TPSM82810

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Описание

TPSM8281x is a family of pin-to-pin 3-A and 4-A compatible high efficiency and easy to use synchronous step-down DC/DC power modules with integrated inductors. They are based on a fixed-frequency peak current-mode control topology. They are used in telecommunication, test and measurement, and medical applications with high power density and ease of use requirements. Low resistance switches allow up to 4-A continuous output current at high ambient temperatures. The switching frequency is externally adjustable from 1.8 MHz to 4 MHz and can also be synchronized to an external clock in the same frequency range. In PFM/PWM mode, the TPSM8281x automatically enters Power Save Mode at light loads to maintain high efficiency across the whole load range. The TPSM8281x provides a 1% output voltage accuracy in PWM mode which helps design a power supply with high output voltage accuracy. The SS/TR pin sets the start-up time or tracks the output voltage to an external source. This allows external sequencing of different supply rails and limits the inrush current during start-up.

Input voltage range: 2.75 V to 6 V
Output voltage range: 0.6 V to 5.5 V
Adjustable and synchronizable switching frequency of 1.8 MHz to 4 MHz
Spread spectrum clocking - optional
Selectable forced PWM or PFM/PWM operation
Output voltage accuracy ±1% (PWM operation)
Power-good output with window comparator
100% duty cycle
Output discharge
Precise ENABLE input allows
- User-defined undervoltage lockout
- Exact sequencing
15-µA typical quiescent current
Adjustable soft-start or tracking

Iout (max) (A)	4
Vin (min) (V)	2.75
Vin (max) (V)	6
Vout (min) (V)	0.6
Vout (max) (V)	5.5
Soft start	Adjustable
Features	EMI Tested, Enable, Frequency synchronization, Light Load Efficiency, Output discharge, Power good, Spread Spectrum, Tracking
Operating temperature range (°C)	-40 to 125
Iq (typ) (mA)	0.015
Regulated outputs (#)	1
Switching frequency (max) (kHz)	4000
Switching frequency (min) (kHz)	1800
Duty cycle (max) (%)	100
Topology	Buck
Type	Module
Rating	Catalog
Control mode	Peak current mode