SI786LSG-E3【PDF 3/16 页】IC REG QD BUCK/LINEAR 28SSOP

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Sheet目录46

1页 2页 [3页]4页 5页 6页 7页

Document Number: 70189

S-40807-Rev. J, 26-Apr-04

www.vishay.com

Vishay Siliconix

Si786

Product is End of Life 3/2014

Notes:

a. The algebraic convention whereby the most negative value is a minimum and the most positive a maximum.

b. Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing.

c. The main switching outputs track the reference voltage. Loading the reference reduces the main outputs slightly according to the closed-loop

gain (AV

) and the reference voltage load-regulation error. AV

for the 3.3 V supply is unity gain. AV

for the 5 V supply is 1.54.

d. Since the reference uses V

as its supply, its V+ line regulation error is insignificant.

e. Limits are for all temperature grades unless otherwise noted.

SPECIFICATIONS

Parameter

Specific Test Conditions

V+ = 15 V, I

= I

REF

= 0 mA, SHDN

= ON

= 5 V

Other Digital Input Levels 0 V or 5 V, T

= T

MIN

to T

MAX

Limits

Unit

Min

Typ

Max

Internal Regulator and Reference

/FB

Switchover Voltage

Rising Edge of FB

, Hysteresis = 1 %

4.2

4.7

REF Output Voltage

No External Load

3.24

3.36

REF Fault Lockout Voltage

Falling Edge

2.4

3.2

REF Load Regulation

0 mA < I

< 5 mA

30 75 mV

V+ Shutdown Current

SHDN

= D

= ON

= 0 V

V+ = 30 V

25 40

礎

V+ Standby Current

= D

= ON

= 0 V

V+ = 30 V

70 110

Si786DG/DRG/DSG

70 115

Quiescent Power Consumption (both

PWM controllers on)

= D

= 0 V, FB

= CS

= 5.25 V

= CS

= 3.5 V

5.5 8.6

Si786DG/DRG/DSG

5.5 9.0

V+ Off Current

= CS

= 5.25 V, V

Switched Over to FB

30 60 礎

Comparators

, D

Trip Voltage

Falling Edge Hysteresis = 1 %

1.61

1.69

Si786DG/DRG/DSG 1.60

1.69

, D

Input Current

= D

= 0 V, 5 V

?100 nA

, Q

Source Current

= 15 V, V

OUT

= 2.5 V

12 20 30

礎

, Q

Sink Current

200 500 1000

, Q

Output High Voltage

SOURCE

= 5 A, V

= 3 V

- 0.5

, Q

Output Low Voltage

SINK

= 20 A, V

= 3 V

0.4

Quiescent V

Current

= 18 V, D

= D

= 5 V, No External Load

4 10 礎

Oscillator and Inputs/Outputs

Oscillator Frequency

SYNC = 3.3 V

270 300 330

kHz

Si786DG/DRG/DSG 260 300 330

SYNC = 0 V, 5 V

170 200 230

Si786DG/DRG/DSG 165 200 230

SYNC High Pulse Width

200

SYNC Low Pulse Width

200

SYNC Rise/Fall Time

Not Tested

200

Oscillator SYNC Range

240

350 kHz

Maximum Duty Cycle

SYNC = 3.3 V

89 92

SYNC = 0 V, 5 V

92 95

Input Low Voltage

SHDN

, ON

SYNC

0.8

Input High Voltage

SHDN

, ON

2.4

SYNC

- 0.5

Input Current

SHDN

, ON

, V

= 0 V, 5 V

?1 礎

/DL

Sink/Source Current

OUT

= 2 V

/DH

Sink/Source Current

BST

- LX

= BST

- LX

= 4.5 V, V

OUT

= 2 V

/DL

On-Resistance

High or Low

?/DIV>

/DH

On-Resistance

High or Low

BST

- LX

= BST

- LX

= 4.5 V

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