CAT6219 Datasheet, PDF (1/10 Pages) Catalyst Semiconductor – 500mA CMOS LDO Regulator

500mA CMOS LDO Regulator
CAT6219
FEATURES
„ Guaranteed 500mA peak output current
„ Low dropout voltage of 300mV typical at 500mA
„ Stable with ceramic output capacitor
„ External 10nF bypass capacitor for low noise
„ Quick-start feature
„ Under voltage lockout
„ No-load ground current of 55μA typical
„ Full-load ground current of 85μA typical
„ ±1.0% output voltage initial accuracy
„ ±2.0% accuracy over temperature
„ “Zero” current shutdown mode
„ Current limit and thermal protection
„ 5-lead thin SOT-23 and 6-lead TDFN packages
APPLICATIONS
„ Cellular phones
„ Battery-powered devices
„ Consumer Electronics
DESCRIPTION
The CAT6219 is a 500mA CMOS low dropout
regulator that provides fast response time during load
current and line voltage changes.
The quick-start feature allows the use of an external
bypass capacitor to reduce the overall output noise
without affecting the turn-on time of just 150μs.
With zero shutdown current and low ground current of
55μA typical, the CAT6219 is ideal for battery-
operated devices with supply voltages from 2.3V to
5.5V. An internal under voltage lockout circuit disables
the output at supply voltages under 2.15V typical.
The CAT6219 offers 1% initial accuracy and low
dropout voltage, 300mV typical at 500mA. Stable
operation is provided with a small value ceramic
capacitor, reducing required board space and compo-
nent cost.
Other features include current limit and thermal
protection.
The device is available in the low profile (1mm max
height) 5-lead thin SOT23 and in the 6-lead 2mm x
2mm TDFN packages.
For Ordering Information details, see page 9.
PIN CONFIGURATION
TYPICAL APPLICATION CIRCUIT
5-Lead Thin SOT-23
(1mm height)
6-Lead TDFN
(2mm x 2mm)
VIN 1
5 VOUT
GND 2 CAT6219
EN 3
4 BYP
EN ¹
GND 2
VIN ³
6 _BYP
5 _NC
4 _VOUT
Top View
Top View
V_IN
2.3V
to 5.5V
VIN
C_IN
VOUT
1µF
CAT6219
OFF ON
EN
BYP
GND
V_OUT
C_OUT
2.2µF
C_BYP (Optional)
10nF
© 2007 Catalyst Semiconductor, Inc.
1
Characteristics subject to change without notice
Doc. No. 10009 Rev. A