LDR3318 datasheet(3/13 Pages) STMICROELECTRONICS

Part #	LDR3318

Description	VERY LOW DROP DUAL VOLTAGE REGULATOR

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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Table 5: Electrical Characteristics (VI1 = VO1+2V, VI2 = VO2+2V, VINH1 = VINH2 = 2.5V,

CI1,2 = 2.2µF, CO1,2 = 4.7µF, IO1 = IO2 = 10mA, TA = -40°C to 125°C, unless otherwise specified. Typical

values are referred at TA = 25°C)

(1): This test is not performed for VO<2.5V.

(2): Guaranteed by design, but not tested in production.

Figure 3: Typical Application Circuit

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

VO1

Output Voltage 1

-5

VNOM1

+5

%V

VO2

Output Voltage 2

-5

VNOM2

+5

%V

VDROP1 Dropout Voltage 1 (1)

IO1 = 500mA

0.3

0.7

V

VDROP2 Dropout Voltage 2 (1)

IO2 = 1A

0.4

0.8

V

∆V

O1

Line Regulation 1

VI1 = VO1+2V to VO1+7V, IO = 250mA

15

30

mV

∆V

O2

Line Regulation 2

VI2 = VO2+2V to VO2+7V, IO = 500mA

15

40

mV

∆V

O1

Load Regulation 1

VI1 = VO1+2V, IO1 = 10 to 500mA

10

mV

∆V

O2

Load Regulation 2

VI2 = VO2+2V, IO2 = 10mA to 1A

60

mV

ISTOT

Total Supply Current

IO1 = IO2 = NO LOAD

2

mA

IS

1 Channel Supply Current

NO LOAD

1

mA

IQMAX

Quiescent Current

IO1 = 500mA, IO2 = 1A

30

mA

ISC1

Short Circuit Current 1

TA = 25°

500

800

mA

ISC2

Short Circuit Current 2

TA = 25°

1

1.6

A

VINH-H Enable Voltage HIGH

2.4

V

VINH-L Enable Voltage LOW

0.8

V

IINH

Enable Pin Current

VINH = 5V

6

µA

SVR

Supply Voltage Rejection (2)

VI1,2 = VO1,2 +3V ±1V, IO1,2 = 10 mA,

f = 120Hz

70

dB

eN

RMS Output Noise (2)

Bandwidth of 10Hz to 100KHz

0.003

%VO

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