MAX15029 Datasheet, PDF (6/10 Pages) Maxim Integrated Products – 1.425V to 3.6V Input, 500mA Low-Dropout Regulators with BIAS Input

1.425V to 3.6V Input, 500mA Low-Dropout
Regulators with BIAS Input
Typical Operating Characteristics (continued)
(Circuit of Figure 1, V_IN = 1.8V, V_OUT = 1.5V, I_OUT = 500mA, T_A = +25°C, unless otherwise noted.)
TURN-ON WITH ENABLE RESPONSE
MAX15029 toc15
1V/div
V_OUT
0
2V/div
TURN-OFF WITH ENABLE RESPONSE
MAX15029 toc16
V_OUT
1V/div
0
V_EN
2V/div
V_EN
0
I_OUT = 500mA
2ms/div
0
I_OUT = 500mA
4µs/div
PIN
MAX15029
MAX15030
1, 2, 3
1, 2
—
3
4
4
5
5
6
6
7
8
9, 10
—
7
8
9, 10
—
Pin Description
NAME
FUNCTION
IN
BIAS
I.C.
EN
SS
FB
GND
OUT
EP
Regulator Input. 1.425V to 3.6V voltage range. Bypass to GND with at least 1µF
of ceramic capacitance. IN is high impedance when the LDO is shut down.
Internal Circuitry Supply Input. BIAS supplies the power for the internal circuitry.
3V to 5.5V voltage range.
Internally Connected. Connect I.C. directly to GND.
LDO Enable. Drive EN high to enable the LDO or connect to IN (BIAS for
MAX15030) for always-on operation. Drive EN low to disable the LDO and place
the IC in low-power shutdown mode.
Soft-Start Input. For typical operation, connect a 0.1µF capacitor from SS to
GND. The soft-start timing is dependent on the value of this capacitor. See the
Soft-Start section.
Feedback Input. Connect FB to the center of a resistor-divider connected
between OUT and GND to set the output voltage. See the Programming the
Output Voltage section.
Ground
Regulator Output. Bypass OUT to GND with at least 2.2µF of ceramic
capacitance for 500mA load operation.
Exposed Pad. Connect EP to GND and a large copper ground plane to facilitate
package power dissipation.
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