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DATA SHEET
TPS65400 4.5- to 18-V Input Flexible Power Management Unit With PMBus/I2C Interface
1 Features
- Efficiency up to 95% for each switching
regulator
- Switching regulator specifications:
- Input voltage range: 4.5
to 18 V
- VOUT range:
0.6 V-90%VIN
- SW1, SW2 IOUT:
4-A max
- SW3, SW4 IOUT:
2-A max
- Prebias start-up algorithm minimizes voltage dip
during start-up
- Internal undervoltage lockout (UVLO), overcurrent
protection (OCP), overvoltage protection (OVP), and overtemperature protection
(OTP)
- AECQ-100 grade 1
option
- Thermally enhanced 7-mm × 7-mm 48-pin, 0.5-mm
pitch VQFN package
- Pin accessible features:
- Adjustable
VOUT with external feedback resistors
- Sequencing control
through precision enable pins for each switcher
- Resistor adjustable PWM
switching frequency from 275 kHz to 2.2 MHz
- Clock sync input and
clock output
- Soft-start delay through
external capacitor
- Current sharing between
SW1 and SW2 and between SW3 and SW4 allows support of higher current
needs if required
- PMBus runtime control and status
- Runtime voltage
positioning through adjustment of VREF
- Enable and disable of
each switcher
- Fault and status
monitoring
- User-configurable PMBus/I2C options,
saved in EEPROM
- Power supply turn-on and
turn-off sequencing
- Sequencing can be based
on fixed time delays or PGOOD dependence
- Initial voltage
positioning through VREF configuration
- PWM frequency adjustment
for each switcher
- Individual PWM phase
alignment for each switcher to minimize ripple and capacitor size
- Adjustable current limit
on each regulator enables size and cost optimization of inductors
- Soft-start time