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IR3629MPBF

HIGH FREQUENCY SYNCHRONOUS PWM BUCK CONTROLLER WITH POWER GOOD OUTPUT

International Rectifier 

IR3629/IR3629A MPbF

Recommended Operating Conditions

Symbol

Definition

Min

Max

Vcc

Supply Voltage

4.5

14

Vc

Supply Voltage

Converter voltage + 5V

28

Tj (Note1) Junction Temperature

-40

125

Note1:

The junction temperature for 5V application is 0oC-125oC

Electrical Specifications

Unless otherwise specified, these specification apply over Vcc=Vc=12V, 0oC<Tj< 105oC

Typical value are specified at Ta=25oC

Parameter

SYM

Test Condition

Min TYP

Accuracy

Feedback Voltage

Accuracy

VFB

0oC<Tj<125oC

-40oC<Tj<105oC, Note2

0.6

-1.5

-2.5

Units

V

V

oC

MAX Units

V

+1.5

+1.5

%

Supply Current

VCC Supply Current

(Static)

VCC Supply Current

(Dynamic)

VC Supply Current

(Static)

VC Supply Current

(Dynamic)

ICC(Static)

ICC(Dynamic)

IC(Static)

IC(Dynamic)

SS=0V, No Switching

IR3629, CLOAD=1.5nF

IR3629A, CLOAD=1.5nF

SS=0V, No Switching

IR3629, CLOAD=1.5nF

IR3629A, CLOAD=1.5nF

10

13

15

25

15

19

mA

4.5

7

17

25

10

15

Under Voltage Lockout

VCC-Start-Threshold VCC_UVLO(R) Supply ramping up

4.0 4.2

4.4

VCC-Stop-Threshold VCC_UVLO(F) Supply ramping down

3.7 3.9

4.1

VCC-Hysteresis

VCC_Hys

Supply ramping up and down 0.15 0.25 0.3

VC-Start-Threshold

VC_UVLO(R) Supply ramping up

3.1 3.3

3.5

V

VC-Stop-Threshold

VC_UVLO(F) Supply ramping down

2.85 3.05 3.25

VC-Hysteresis

VC_Hys

Supply ramping up and down 0.15 0.2 0.25

Oscillator

Frequency

FS

IR3629A

IR3629

270 300 330

540 600 660

kHz

Ramp Amplitude

Vramp

Note3

1.25

V

Min Duty Cycle

Min Pulse Width

Dmin

Dmin(ctrl)

Fb=1V

IR3629, Note3

IR3629A , Note3

0

%

80

ns

160

IR3629, Fb=0.5V

71

Max Duty Cycle

Dmax

%

IR3629A, Fb=0.5V

78

11/26/2007

5

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