LP3999

www.ti.com

SNVS207E – JUNE 2003 – REVISED MAY 2013

Electrical Characteristics (continued)

Unless otherwise noted, VEN = 1.5, VIN = VOUT(NOM) + 1.0V, CIN = 1 µF, IOUT = 1 mA, COUT = 1 µF, CBP = 0.01 µF. Typical

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

temperature range for operation,

−40 to +125°C.

(1) (2)

Limit

Symbol

Parameter

Conditions

Typical

Units

Min

Max

VDO

Dropout Voltage

IOUT = 1 mA

0.4

2

mV

IOUT = 150 mA

60

100

PSRR

Power Supply Rejection Ratio(3)

f = 1 kHz, IOUT = 1 mA

60

dB

f = 10 kHz, IOUT = 1 mA

50

FULL VOUT RANGE

ILOAD

Load Current

See (4) and (3)

0

µA

IQ

Quiescent Current

VEN = 1.5V, IOUT = 0 mA

85

150

VEN = 1.5V, IOUT = 150 mA

140

200

µA

VEN = 0.4V

0.003

1.5

ISC

Short Circuit Current Limit

450

mA

EN

Output Noise Voltage(3)

BW = 10 Hz to 100 kHz,

10

VIN = 4.2V, No Load

µVrms

BW = 10 Hz to 100 kHz,

30

VIN = 4.2V, 1mA Load

TSHUTDOWN

Thermal Shutdown

Temperature

160

°C

Hysteresis

20

ENABLE CONTROL CHARACTERISTICS

IEN

Maximum Input Current at VEN

VEN = 0.0V and VIN = 6.0V

0.001

µA

Input

VIL

Low Input Threshold

0.4

V

VIH

High Input Threshold

0.9

V

TIMING CHARACTERISTICS

TON

Turn On Time (5)

To 95% Level (6)

140

µs

(4)

The device maintains the regulated output voltage without load.

(5)

This electrical specification is ensured by design.

(6)

Time from VEN = 0.9V to VOUT = 95% (VOUT(NOM))

Recommended Output Capacitor

Limit

Symbol

Parameter

Conditions

Typical

Units

Min

Max

COUT

Output Capacitor

Capacitance (1)

1.0

0.70

µF

ESR

5

500

m

Ω

(1)

The capacitor tolerance should be 30% or better over temperature. Recommended capacitor type is X7R however dependant on

application X5R,Y5V and Z5U can also be used.

Copyright © 2003–2013, Texas Instruments Incorporated

Submit Documentation Feedback

5

Product Folder Links: LP3999