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ISL91132 Datasheet(PDF) 1 Page - Renesas Technology Corp

Part # ISL91132
Description  High Efficiency 1.8A Boost Regulator with Input-to-Output Bypass
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

ISL91132 Datasheet(HTML) 1 Page - Renesas Technology Corp

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FN8637 Rev.1.00
Page 1 of 2
Decem ber 8, 2016
FN8637
Rev.1.00
Decem ber 8, 2016
ISL91132
High Efficiency 1.8A Boost Regulator with Input-to-Output Bypass
DATA SHORT
To request the full datasheet, please visit www.intersil.com/products/isl91132
The ISL91132 is an integrated boost switching regulator for
battery powered applications. The device provides a power
supply solution for products using a one cell Li-ion or Li-
polymer battery.
The device is capable of delivering up to 1.8A output current
from VIN = 2.5V and VOUT = 3.3V. The no-load quiescent
current is only 108μA in Boost mode and 45μA in Forced
Bypass mode, which significantly reduces the standby
consumption.
The ISL91132 offers a Bypass mode operation where the
output is directly connected to the input through a 38mΩ
MOSFET to allow a significantly lower dropout voltage. The
Bypass mode can be entered by an external command, or by
auto bypass. The Forced Bypass mode allows the output
voltage to operate close to the input voltage and improves the
efficiency under these conditions.
The ISL91132 is designed to support six fixed output voltages
ranging from 3.15V to 5V. A voltage select pin is available for
each output variant to scale up the output voltage by a small
offset to compensate the load transient droop.
The ISL91132 requires only an inductor and a few external
components to operate. The 2.5MHz switching frequency
further reduces the size of external components.
The ISL91132 is available in a 16 bump, 0.4mm pitch,
1.78mmx1.78mm WLCSP.
Features
• Input voltage range: 2.35V to 5.4V
•Output current: up to 1.8A (VIN = 2.5V, VOUT = 3.3V)
•Burst current up to 2A (VIN = 2.5V, VOUT = 3.3V, tON < 600µs,
T = 4.6ms)
• High efficiency: up to 96%
• 108µA quiescent current minimizes standby consumption in
Boost mode, 45µA in Forced Bypass mode
• 2.5MHz switching frequency minimizes external component
size
• Forced Bypass or Auto Bypass modes with a 38mΩ switch
• PFM mode at light-load currents
• Fully protected for overcurrent, over-temperature, and
undervoltage
• Load disconnect when disabled
• Small 1.78mmx1.78mm WLCSP
Applications
• Smartphones and tablet PCs
• Wireless communication devices
• 2G/3G/4G RF power amplifiers
•USB OTG power source
Related Literature
• AN1942, “ISL91132 Evaluation Board User Guide”
• AN9208, “High Frequency Power Converters”
FIGURE 1. TYPICAL APPLICATION
VIN = 2.35V
TO 5.4V
VOUT = 3.3V TO VIN
UP TO 1.5A
ISL91132IIMZ
VIN
EN
LX
VOUT
C2
22µF
GND
PGND
C1
22µF
PG
RESET
R1
BYPS
AUTO BYPASS
FORCED BYPASS
L1
0.47µH
VSEL
VOUT HI
VOUT LO
FIGURE 2. EFFICIENCY vs LOAD CURRENT, VOUT = 3.3V
84
86
88
90
92
94
96
98
100
0.001
0.010
0.100
1.000
2.7 VIN
4 VIN
3 VIN
LOAD CURRENT (A)


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