L6739 datasheet(9/30 Pages) STMICROELECTRONICS

部件名	L6739

功能描述	CPU and DSP power supply

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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L6739

Electrical specifications

30

3.2

Electrical characteristics

Table 6. Electrical characteristics

(VCC = 12 V; VCCDR = open; TA = 25 C unless otherwise specified)

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

Supply current and power-on

ICC

VCC supply current

EN = HIGH

7.5

mA

EN = GND

6.0

mA

EN = HIGH, VCCDR = VCC = 5 V

5.5

mA

EN = GND, VCCDR = VCC = 5 V

4

mA

ICCDR

VCCDR supply current

VCC = VCCDR = 5 V,

UGATE and LGATE = open,

EN = HIGH, UGATE ON,

LGATE OFF

0.4

mA

VCC = VCCDR = 5 V,

UGATE and LGATE = open,

EN = HIGH, UGATE OFF,

LGATE ON

0.4

mA

VCC = VCCDR = 5 V,

EN = GND

UGATE and LGATE = open

0.2

mA

UVLOVCC

Turn-ON threshold

VCC rising

4.1

V

Hysteresis

0.2

V

UVLOVCCDR

Turn-ON threshold

VCCDR rising

3.9

V

Hysteresis

0.15

V

LDO

Voltage

5.75

V

Turn-ON threshold

Measured at the VCC pin

6.1

V

Turn-OFF threshold

3.5

V

Oscillator enable and soft-start

FSW

Main oscillator accuracy

OSC = open

180

200

220

kHz

kOSC

Oscillator gain

Current sink/source from OSC

10

kHz/

A

tSS

Soft-start time

OSC = open

4.5

5.12

5.7

msec

tSSdelay

SS delay

OSC = open, before SS

4.5

5.12

5.7

msec

VOSC

PWM ramp amplitude

2

V

d

Duty cycle

0

100

%

ENABLE

EN

Input logic high

EN rising

1.1

V

Input logic low

EN falling

0.5

V

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