ISL80121-5 Datasheet, PDF (1/11 Pages) Intersil Corporation – 1A Ultra Low Dropout Linear Regulator with Programmable Current Limiting

1A Ultra Low Dropout Linear Regulator with
Programmable Current Limiting
ISL80121-5
The ISL80121-5 is a low dropout voltage, single output LDO with
programmable current limiting. This LDO operates from input
voltages of 2.2V to 6V. The ISL80121-5 has a nominal output
voltage of 5V. Other custom voltage options are available upon
request.
A sub-micron BiCMOS process is utilized for this product family to
deliver the best in class analog performance and overall value.
The programmable current limiting improves system reliability of
applications. An external capacitor on the soft-start pin provides
an adjustable soft-starting ramp. The ENABLE feature allows the
part to be placed into a low quiescent current shutdown mode.
This CMOS LDO will consume significantly lower quiescent
current as a function of load compared to bipolar LDOs, which
translates into higher efficiency and packages with smaller
footprints. Quiescent current is modestly compromised to
achieve a very fast load transient response.
Features
• ±1.8% V_OUT Accuracy Guaranteed Over Line, Load and
T_J = -40°C to +125°C
• Very Low 130mV Dropout Voltage at V_IN = 5.0V
• High Accuracy Current Limit Programmable up to 1.75A
• Very Fast Transient Response
• 200µV_RMS Output Noise
• Power Good Output
• Programmable Soft-starting
• Over-Temperature Protection
• Small 10 Ld DFN Package
Applications
• USB devices
• Telecommunications and Networking
• Medical Equipment
• Instrumentation Systems
• Routers and Switchers
• Gaming
Typical Applications
5.4V ±10%
VIN
C_IN
10µF
ISL80121-5
10
VIN
9
VIN
1
VOUT
VOUT ²
8
ISET
3
SENSE
ON
OFF
7
ENABLE
4
PG
6
SS _GND
C_SS
5
5.0V ±1.8%
VOUT
C_OUT
10µF
R_PG
100kΩ
PGOOD
5.4V ±10%
VIN
C_IN
10µF
ISL80121-5
10
VIN
9
VIN
1
VOUT
2
VOUT
8
ISET
3
SENSE
R_ISET
10kΩ
ON
OFF
7
ENABLE
6
SS GND
4
PG
C_SS
5
5.0V ±1.8%
VOUT
R_SENSE
10Ω
C_OUT
10µF
R_PG
100kΩ
PGOOD
ILIMIT = 0.75A
(default)
ILIMIT = 0.75 + _{R------S-----E--2---T--.--9(}----k-----_Ω------₎-
December 8, 2010
1
FN7713.1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas Inc. 2010. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners