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PDF L7292 Data sheet ( Hoja de datos )
| Número de pieza | L7292 | |
| Descripción | Five buck regulators power management unit | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de L7292 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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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
BUCK3
BUCK4
BUCK5
1.5 - 2.1
0.7 - 1.3
0.7 - 1.3
0.7 - 1.3
0.8
0.5
1.0
1.6
November 2015
This is information on a product in full production.
DocID028601 Rev 1
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www.st.com
1 page  
L7292
13
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Contents
PCB design rules guideline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
13.1 Basic principles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
13.2 Layout rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
13.2.1 Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
13.2.2 Switch node . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
13.2.3 Feedback node . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
13.2.4 Output capacitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
13.3 PCB layout recommendation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
13.4 General rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
13.5 Thermal aspects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Evaluation tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
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L7292
4 Absolute maximum ratings
Absolute maximum ratings
The absolute maximum rating is the maximum stress that can be applied to a device without
causing permanent damage. However, extended exposure to maximum ratings may affect
long-term device reliability.
Table 3. Absolute maximum ratings
Parameter
SUP, SUP14 - 2 - 3 - 5, SUPDR
VBUS
SW 1 - 5
FB 1 - 5
SDA, SCL, POR, MODA, MODB
LDO INT
LDO
Operating ambient temperature
Operating virtual junction temperature
Thermal resistance, junction to ambient
QFN 5 x 5 x 0.9 40L
30 °C/W
Storage temperature
Solder temperature - 10 s duration
Rating
-0.3 V - 7 V
-0.3 V - 7 V
-0.3 V - 7 V
-0.3 V - 4 V
-0.3 V - VBUS
-0.3 V - 2.5 V
-0.3 V - 7 V
-30 °C to 85 °C
170 °C
-55 °C to 150 °C
250 °C
DocID028601 Rev 1
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11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet L7292.PDF ] | |
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