LP3996

SNVS360D – NOVEMBER 2006 – REVISED OCTOBER 2013

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ELECTRICAL CHARACTERISTICS

(1)(2) (continued)

Unless otherwise noted, VEN = 950 mV, VIN = VOUT + 1.0V, or 2.0V, whichever is higher, where VOUT is the higher of VOUT1 and

VOUT2. CIN = 1 µF, IOUT = 1 mA, COUT1 = COUT2 = 1.0 µF.

Typical values and limits appearing in normal type apply for TA = 25°C. Limits appearing in boldface type apply over the full

junction temperature range for operation,

−40 to +125°C.

LIMIT

SYMBOL

PARAMETER

CONDITIONS

TYP

UNITS

MIN

MAX

ISC

Short Circuit Current Limit

LDO 1

420

750

mA

LDO 2

550

840

IOUT

Maximum Output Current

LDO 1

150

mA

LDO 2

300

PSRR

Power Supply Rejection Ratio(5)

f = 1kHz, IOUT = LDO1

58

1mA to 150 mA

LDO2

70

CBYP = 10 nF

dB

f = 20 kHz, IOUT

LDO1

45

= 1mA to 150

mA

LDO2

60

CBYP = 10 nF

en

Output noise Voltage(5)

BW = 10 Hz to

VOUT = 0.8V

36

100kHz

µVRMS

VOUT = 3.3V

75

CBYP = 10 nF

TSHUTDOWN

Thermal Shutdown

Temperature

160

°C

Hysteresis

20

Enable Control Characteristics

IEN

Input Current at VEN1 or VEN2

VEN = 0.0V

0.005

0.1

µA

VEN = 6V

2

5

VIL

Low Input Threshold at VEN1 or

0.4

V

VEN2

VIH

High Input Threshold at VEN1 or

0.95

V

VEN2

POR Output Characteristics

VTH

Low Threshold % 0f VOUT2 (NOM)

Flag ON

88

%

High Threshold % 0f VOUT2 (NOM)

Flag OFF

96

IPOR

Leakage Current

Flag OFF, VPOR = 6.5V

30

nA

VOL

Flag Output Low Voltage

ISINK = 250 µA

20

mV

Timing Characteristics

TON

Turn On Time(5)

To 95% Level

300

µs

CBYP = 10 nF

Transient

Line Transient Response

Trise = Tfall = 10 µs

20

Response

|

δVOUT|

(5)

δVIN = 1VCBYP = 10 nF

Load Transient Response

Trise = Tfall = 1

LDO 1

|

δVOUT|

(5)

µs

IOUT = 1 mA to 150

175

mV

mA

(pk - pk)

LDO 2

IOUT = 1 mA to 300

150

mA

SET Input Characteristics

ISET

SET Pin Current Source

VSET = 0V

1.3

µA

VTH(SET)

SET Pin Threshold Voltage

POR = High

1.25

V

(5)

This electrical specification is specified by design.

6

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