CAT6221 Datasheet, PDF (1/11 Pages) Catalyst Semiconductor – 300mA CMOS Dual LDO Regulator

300mA CMOS Dual LDO Regulator
CAT6221
FEATURES
„ Two outputs with guaranteed 300mA peak
output current
„ Low dropout voltages of 210mV typical at
300mA
„ Stable with ceramic output capacitors
„ Independent enable pins
„ Under voltage lockout
„ No-load ground current of 100μA typical
„ Full-load ground current of 160μA typical
„ ±1.0% output voltage initial accuracy
„ ±2.0% accuracy over temperature
„ “Zero” current shutdown mode
„ Fold-back current limit and thermal protection
„ TSOT-23 6-lead, 0.8mm height package
APPLICATIONS
„ Cellular phones
„ Battery-powered devices
„ Consumer Electronics
DESCRIPTION
The 300mA CMOS Dual LDO CAT6221 combines in a
single TSOT-23 6-lead package two low dropout
regulators (LDO), each with its own enable pin.
The regulator outputs drive loads up to 300mA. By
design, the dual LDO provides fast response time
during load current and line voltage changes.
Each LDO is optimized for low noise and high
crosstalk isolation. With zero shut down current and a
low quiescent current of 100μA, the dual LDO is ideal
for battery-operated devices with supply voltage from
2.3V to 5.5V.
The dual LDO offers 1% initial accuracy and very low
dropout voltage, typical 210mV at 300mA. Stable
operation is provided with small 1μF ceramic output
capacitors, reducing required board space and
component cost.
Other features include fold-back current limit and
thermal protection.
The dual LDO is available in the tiny 6-lead TSOT-23
package with a maximum height of 0.8mm.
For Ordering Information details, see page 10.
PIN CONFIGURATION
6-Lead TSOT-23
(0.8mm height)
EN1 1
6 VOUT1
VIN 2 CAT4201 5 GND
EN2 3
4 VOUT2
Top View
TYPICAL APPLICATION CIRCUIT
VIN
2.3V to 5.5V
OFF ON
OFF ON
VIN
C_IN
VOUT1
1µF ^CAT6221
EN1 _VOUT2
EN2 _GND
VOUT1
C_OUT1
1µF
VOUT2
C_OUT2
1µF
© Catalyst Semiconductor, Inc.
1
Characteristics subject to change without notice
Doc. No. MD-10001 Rev. A