Unless otherwise noted, V

and V

= 25˚C. Limits appearing in boldface type apply over the full junction temperature range for operation, −40 to +125˚C.

Symbol

Parameter

Conditions

Typ

Limit

Units

Min

Max

PSRR

Power Supply Rejection Ratio

(Note 11)

f = 1kHz, I

OUT

= 1mA to

150mA

C

LDO1

58

dB

LDO2

70

f = 20kHz, I

OUT

= 1mA to

150mA

C

LDO1

45

LDO2

60

e

n

Output noise Voltage (Note 11)

BW = 10Hz to

100kHz

C

V

36

µV

RMS

V

75

T

SHUTDOWN

Thermal Shutdown

Temperature

160

˚C

Hysteresis

20

Enable Control Characteristics

I

EN

Input Current at V

V

0.005

0.1

µA

V

2

5

V

IL

Low Input Threshold at V

V

EN2

0.4

V

V

IH

High Input Threshold at V

V

EN2

0.95

V

POR Output Characteristics

V

TH

Low Threshold % 0f V

OUT2 (NOM)

Flag ON

88

%

High Threshold % 0f V

OUT2

(NOM)

Flag OFF

96

I

POR

Leakage Current

Flag OFF, V

30

nA

V

OL

Flag Output Low Voltage

I

20

mV

Timing Characteristics

T

ON

Turn On Time (Note 11)

To 95% Level

C

300

µs

Transient

Response

Line Transient Response |

δV

(Note 11)

T

δV

20

mV

(pk - pk)

Load Transient Response

|

δV

(Note 11)

T

1µs

LDO 1

I

150mA

175

LDO 2

I

300mA

150

SET Input Characteristics

I

SET

SET Pin Current Source

V

1.3

µA

V

TH(SET)

SET Pin Threshold Voltage

POR = High

1.25

V

www.national.com

6