L7292 Datasheet, PDF (1/60 Pages) STMicroelectronics – Five buck regulators power management unit

L7292
Five buck regulators power management unit
VQFN 5 x 5 x 0.9 40L
Features
 Key specification
– Vin range from 2.7 V to 5.5 V
 Interface
– Two-wire I²C serial interface supports
3.4-Mbit protocol (high speed mode)
– 8-bit register bank
– Random and Sequential Read modes
– Automatic address incrementing
 Programmable buck regulators
– Regulators with programmable DC set
point and soft-start
– Buck regulators include integrated PMOS
and NMOS switching elements
– Up to 90% efficiency
– PWM and PFM modes
– Two pins to select four sets of DC voltages
– ± 1% feedback voltage accuracy
– All regulators with auto discharge function
on reset.
– Programmable bucks
 Support functions
 128-bit EEPROM for:
– Default Vout
– Power up sequence
– Reset IC delay time
– Regulator enable
 Integrated voltage monitor with digital filters
 Thermal protection
 Package: VQFN 5 x 5 x 0.9 40L
Datasheet - production data
Applications
 SSD (Solid-State Drive), portable phone, etc.
Description
The L7292 is a power management device
designed for consumer applications. Five bucks
provide voltages for the µController and Flash
memory with efficiency up to 90% in light-load
condition.
The device communicates with the µController via
an I²C serial interface operating at clock speeds
up to 3.4 Mbit/s.
The regulators operate at 1.3 MHz switching
frequency and enter automatically in the PFM
operation to maintain high efficiency over the
entire load current range.
The device can be forced into the PWM mode by
writing a bit in the serial port register.
Low quiescent current (e.g.: All SW reg. ON with
no load Iq = 175 µA).
The L7292 device has a DSM mode to reduce the
quiescent current at the minimum value (1 x SW
reg. ON with no load Iq = 60 µA).
Table 1. Device summary
Regulator
Vout range [V] DC Iload [A]
BUCK1
0.9 - 1.6
1.0
BUCK2
1.5 - 2.1
0.8
BUCK3
0.7 - 1.3
0.5
BUCK4
0.7 - 1.3
1.0
BUCK5
0.7 - 1.3
1.6
November 2015
This is information on a product in full production.
DocID028601 Rev 1
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