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ISL9012
Data Sheet
September 27, 2005
FN9220.0
Dual LDO with Low Noise, Low I
Q
, and
High PSRR
ISL9012 is a high performance dual LDO capable of
sourcing 150mA current from channel 1 and 300mA from
channel 2. The device has a low standby current and high-
PSRR and is stable with output capacitance of 1碌F to 10碌F
with ESR of up to 200m鈩?
The device integrates a Power-On-Reset (POR) function for
the VO2 output. The POR delay for VO2 can be externally
programmed by connecting a timing capacitor to the CPOR
pin. A reference bypass pin is also provided for connecting a
noise-filtering capacitor for low noise and high PSRR
applications.
The quiescent current is typically only 45碌A with both LDO鈥檚
enabled and active. Separate enable pins control each
individual LDO output. When both enable pins are low, the
device is in shutdown, typically drawing less than 0.1碌A.
Several combinations of voltage outputs are standard.
Others are available on request. Output voltage options for
each LDO range from 1.2V to 3.6V.
Features
鈥?Integrates two high performance LDOs
- VO1 - 150mA output
- VO2 - 300mA output
鈥?Excellent transient response to large current steps
鈥?Excellent load regulation:
鈥?<1% voltage change across full range of load current
鈥?High PSRR: 70dB @ 1kHz
鈥?Wide input voltage capability: 2.3V - 6.5V
鈥?Extremely low quiescent current: 45碌A (both LDOs on)
鈥?Low dropout voltage: typically 120mV @ 150mA
鈥?Low output noise: typically 30碌Vrms @ 100碌A(1.5V)
鈥?Stable with 1-10碌F ceramic capacitors
鈥?Separate enable pins for each LDO
鈥?POR output, with adjustable delay time indicates when the
VO2 output is good
鈥?Soft-start to limit input current surge during enable
鈥?Current limit and overheat protection
Pinout
ISL9012
10-PIN 3X3 DFN
TOP VIEW
VIN
EN1
EN2
CBYP
CPOR
10 VO1
9
8
7
6
VO2
POR
NC
GND
鈥?卤1.8% accuracy over all operating conditions
鈥?Tiny 10 Ld 3x3mm DFN package
鈥?-40掳C to +85掳C operating temperature range
1
2
3
4
5
鈥?Pin compatible with Micrel MIC2212
鈥?Pb-free plus anneal available (RoHS compliant)
Applications
鈥?PDAs, Cell Phones and Smart Phones
鈥?Portable Instruments, MP3 Players
鈥?Handheld Devices including Medical Handhelds
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or1-888-468-3774
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright 漏 Intersil Americas Inc. 2005. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
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