
1
FN9219.1
ISL9011
Dual LDO with Low Noise, Low I
Q
, and 
High PSRR
ISL9011 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
μ
F to 10
μ
F 
with ESR of up to 200m
.
A reference bypass pin allows an external capacitor for 
adjusting a noise filter for low noise and high PSRR 
applications. 
The quiescent current is typically only 45
μ
A with both LDO’s 
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
μ
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.
Pinout
ISL9011
10 LD 3X3 DFN
TOP VIEW
Features
 Integrates two high performance LDOs
- VO1 - 150mA output
- VO2 - 300mA output
 Excellent transient response to large current steps
 Excellent load regulation:
 <1% voltage change across full range of load current
 High PSRR: 70dB @ 1kHz
 Wide input voltage capability: 2.3V - 6.5V
 Extremely low quiescent current: 45
μ
A (both LDOs active)
 Low dropout voltage: typically 120mV @ 150mA
 Low output noise: typically 30
μ
Vrms @ 100
μ
A (1.5V)
 Stable with 1-10
μ
F ceramic capacitors
 Separate enable pins for each LDO
 Soft-start to limit input current surge during enable
 Current limit and overheat protection
 ±1.8% accuracy over all operating conditions
 Tiny 10 Ld 3x3mm DFN package
 -40°C to +85°C operating temperature range
 Pin compatible with Micrel MIC2211
 Pb-free plus anneal available (RoHS compliant)
Applications
 PDAs, Cell Phones and Smart Phones
 Portable Instruments, MP3 Players
 Handheld Devices including Medical Handhelds
VIN
EN1
EN2
CBYP
NC
VO1
VO2
NC
NC
GND
2
3
4
1
5
9
8
7
10
6
Data Sheet
October 13, 2005
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
 Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright  Intersil Americas Inc. 2005. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.