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MAS9128AS

LDO Voltage Regulator IC

Micro Analog Systems Oy 

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DA9128A.002

July 12, 1998

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€8#}‚#ƒ8„ …Aƒ8†%‡Yˆ  ˆ ƒ!† ‰ Šˆ †Œ‹%%ŽŠ¨{ ‘¤†%ˆ  (TAMB = -200C to +700C, unless otherwise noted. Typical value for TJ is 270C Cin=1µF Cout= 1µF,ceramic)

Output voltage

Short circuit current

VOUT

3.1V < VCC < 6.5V,

0mA < IOUT < IMAX

2.7

2.85

3.0

V

LDO_A

LDO_B

LDO_C

Load Current

IMAXA

IMAXB

IMAXC

310

mA

220

mA

170

mA

LDO_A

LDO_B

LDO_C

Line regulation

Load regulation

LDO_A

IOUTA

IOUTB

IOUTC

1Vpp at VCC, max. load

0mA < IOUT < IMAX

0

100

mA

0

70

mA

0

50

mA

1.1

10

mV

9

45

mV

LDO_B

6

31

mV

LDO_C

Load transient

TAMB = 25oC

10uA to ½ load in 1us (4)

5

22

mV

-60

mV

100uA to max. Load in 1us (4)

-70

mV

10uA to max. Load in 1us (5)

-85

mV

PSRR

f ≤ 10kHz, 1Vpp at VCC = 4.5V

50

60

dB

CREF = 10nF

Quiescent current

(3)

per regulator

IQR

ON, max. load

170

uA

IQR

ON, IOUT = 100uA

150

uA

IQR

OFF

<1

uA

Total quiescent

IQ

current

Noise

ENA = ENBC = 0V

IOUT = 0 VCC = 6.5V

<1

30

µA

Settling time

Output capacitor

10Hz < f < 100kHz

typical load, no capacitor at VREF

10Hz < f < 100kHz

typical load, 10nF cap. at VREF

Enables OFF to ON

2.7V < VOUT < 3.0V

10nF cap. at VREF

190

uVrms

50

uVrms

0.5

1.0

ms

COUT

ESR

0.8

1.0

0.01

0.1

2.6

uF

1

Ohm

NOTE 3:To get the real quiescent current of the device, the quiescent current of the reference voltage generator

(140uA typ.) has to be added together once for all regulators.

NOTE 4:VOUT does not drop below 2.7V for more than 1us.

NOTE 5:VOUT does not drop below 2.5V for more than 1us or below 2.7V for more than 50us.

4

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