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http://www.union-ic.com Rev.07 Dec.2014

11/19

UM153xx/UM154xx

Typical Performance Characteristics (Continued)

Typical Application Circuit

GND

VOUT

VIN

1

μF(Ceramic)

1

μF(Ceramic)

UM153xx

GND

VOUT

VIN

1

μF(Ceramic)

1

μF(Ceramic)

UM154xx

EN

off

on

Applications Information

Output Capacitance and Transient Response

The UM153xx/UM154xx series regulators are designed to be stable with a wide range of output

capacitors. The ESR of the output capacitor affects stability, most notably with small capacitors. A

minimum output capacitor of 1μF with an ESR of 0.3Ω or less is recommended to ensure stability.

The device’s output transient response will be a function of output capacitance. Larger values of

PSRR vs Frequency

UM15340S

Io=10mA

Io=100mA