L6910G Просмотр технического описания (PDF) - STMicroelectronics

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L6910G

ADJUSTABLE STEP DOWN CONTROLLER WITH SYNCHRONOUS RECTIFICATION

STMicroelectronics 

L6910G

Table 5. Electrical Characteristics (Vcc = 12V, TJ =25°C unless otherwise specified)

Symbol

Parameter

Test Condition

Min Typ

Vcc SUPPLY CURRENT

Icc Vcc Supply current

OSC = open; SS to GND

4

7

POWER-ON

Turn-On Vcc threshold

VOCSET = 4V

4.0

4.3

Turn-Off Vcc threshold

VOCSET = 4V

3.8

4.1

Rising VOCSET threshold

1.24

Turn On EAREF threshold

VOCSET = 4V

650

SOFT START AND INHIBIT

Iss Soft start Current

S.S. current in INH condition

SS = 2V

SS = 0 to 0.4V

6

10

35

OSCILLATOR

fOSC Initial Accuracy

OSC = OPEN

OSC = OPEN; Tj = 0° to 125°

180 200

170

fOSC,RT Total Accuracy

16 KΩ < RT to GND < 200 KΩ

-15

∆Vosc Ramp amplitude

1.9

REFERENCE

VOUT Output Voltage Accuracy

VOUT = VFB; VEAREF = VREF

0.886 0.900

VREF Reference Voltage

CREF = 1nF; IREF = 0 to 100µA

0.886 0.900

VREF Reference Voltage

CREF = 1nF; TJ = 0 to 125°C

-2

ERROR AMPLIFIER

IEAREF N.I. bias current

VEAREF = 3V

10

EAREF Input Resistance

Vs. GND

300

IFB I.I. bias current

VFB = 0V to 3V

0.01

VCM Common Mode Voltage

0.8

VCOMP Output Voltage

0.5

GV Open Loop Voltage Gain

70

85

GBWP Gain-Bandwidth Product

10

SR Slew-Rate

COMP = 10pF

10

GATE DRIVERS

IHGATE High Side

Source Current

VBOOT - VPHASE = 12V

VHGATE - VPHASE = 6V

1

1.3

RHGATE High Side

VBOOT - VPHASE = 12V

2

Sink Resistance

ILGATE Low Side Source Current

Vcc = 12V; VLGATE = 6V

0.9

1.1

RLGATE Low Side Sink Resistance

Vcc = 12V

1.5

Output Driver Dead Time

PHASE connected to GND

90

PROTECTIONS

IOCSET OCSET Current Source

VOCSET = 4V

170 200

Over Voltage Trip (VFB / VEAREF) VFB Rising

117

IOSC OSC Sourcing Current

VFB > OVP Trip

15

30

POWER GOOD

Upper Threshold (VFB / VEAREF) VFB Rising

108 110

Lower Threshold (VFB / VEAREF) VFB Falling

88

90

Hysteresis (VFB / VEAREF)

Upper and Lower threshold

2

VPGOOD PGOOD Voltage Low

IPGOOD = -4mA

0.4

IPGOOD Output Leakage Current

VPGOOD = 6V

0.2

Max

9

4.6

4.4

1.4

750

14

60

220

230

15

0.913

0.913

+2

0.5

3

4

4

3

210

230

120

112

92

1

Unit

mA

V

V

V

mV

µA

µA

KHz

kHz

%

V

V

V

%

µA

kΩ

µA

V

V

dB

MHz

V/µs

A

Ω

A

Ω

ns

µA

%

mA

%

%

%

V

µA

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