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SP6133

Synchronous Buck Controller

Signal Processing Technologies 

ELECTRICAL SPECIFICATIONS

Unless otherwise specified: -40°C < TAMB < +85°C, 4.5V < VCC < 5.5V, BST=VCC,SWN = GND = PGND = 0.0 V, UVIN = 3.0V,

CVCC = 0.1µF, CCOMP = 0.1µF, CGH = CGL = 3.3nF, CSS = 50nF.

PARAMETER

MIN TYP MAX UNITS CONDITIONS

CONTROL LOOP: PWM COMPARATOR, RAMP & LOOP DELAY PATH

Ramp Offset

1.7 2.0 2.3

V TA = 25˚C

Ramp Amplitude

0.80 1.0 1.20

V

GH Minimum Pulse Width

50 100

ns

Maximum Controllable Duty

Ratio

92

%

Maximum Duty Ratio

100

%

Guaranteed by

design

Internal Oscillator Frequency 255 300 345

kHz

TIMERS: SOFTSTART

SS Charge Current:

-16 -10

-4

µA

SS Discharge Current:

1.0 2.0 3.0

mA Fault Present

VCC Linear Regulator

VCC Output Voltage

4.6 5.0 5.4

Dropout Voltage

Power Good Output

Power Good Threshold

250 500 750

-10 -7.5

-5

VIN = 6 to 23V,

V

ILOAD = 0mA to

30mA

mV IVCC = 30mA

%

Power Good Hysteresis

2.0 4.0

%

Power Good Sink Current

1.0

10

mA

VFB = 0.7V,

VPWRGD = 0.2V

PROTECTION: Short Circuit & Thermal

Short Circuit Threshold

Voltage

0.2 0.25 0.3

Overcurrent Threshold Voltage 54

60

66

ISP, ISN Common Mode

Range

Hiccup Timeout

Thermal Shutdown

Temperature

Thermal Hysteresis

0

3.3

185 220 270

135 145 155

10

V

Measured VREF

(0.8V) - VFB

mV

Measured ISP

- ISN

V

ms

˚C

Guaranteed by

design

˚C

Oct 24-06 Rev L

SP6133 Synchronous Buck Controller



© 2006 Sipex Corporation

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