SP6137 datasheet(2/13 Pages) SIPEX

2 / 13 page

Date: 7/28/04

SP6137 Wide Input, 900KHz Synchronous PWM Controll

PARAMETER

MIN

TYP

MAX

UNITS

♦

CONDITIONS

QUIESCENT CURRENT

VCC Supply Current

1.5

VFB =0.9V (No switching)

BST Supply Current

0.2

0.4

♦

VFB =0.9V (No switching)

PROTECTION: UVLO

VCC UVLO Start Threshold

4.00

4.25

4.5

♦

VCC UVLO Stop Threshold

3.80

4.05

4.4

♦

VCC UVLO Hysteresis

200

UVIN Start Threshold

2.3

2.5

2.65

♦

UVIN Stop Threshold

2.0

2.2

2.35

♦

UVIN Hysteresis

300

ERROR AMPLIFIER REFERENCE

Error Amplifier Reference

0.792

0.800

0.808

2X Gain Config., Measure COMP/2

Error Amplifier Reference

0.788

0.800

0.812

Over Line and Temperature

♦

Error Amplifier Transconductance

Error Amplifier Gain

No Load

COMP Sink Current

150

µAVFB = 0.9V, COMP = 0.9V

COMP Source Current

150

µAVFB = 0.7V, COMP = 2.2V

VFB Input Bias Current

200

♦

VFB = 0.8V

Internal Pole

MHz

COMP Clamp

2.5

VFB=0.7V, TA = 25°C

COMP Clamp Temp. Coefficient

-2

mV/°C

CONTROL LOOP: PWM COMPARATOR, RAMP & LOOP DELAY PATH

Ramp Amplitude

0.92

1.1

1.28

♦

RAMP Offset

1.1

TA = 25°C, RAMP COMP

until GH starts switching

RAMP Offset Temp. Coefficient

-2

mV/°C

GH Minimum Pulse Width

180

♦

Maximum Controllable Duty Ratio

♦

Maximum Duty Ratio Measured just

before pulse skipping begins

Maximum Duty Ratio

100

Valid for 20 Cycles

Internal Oscillator Frequency

810

900

990

kHz

♦

ELECTRICAL SPECIFICATIONS

Unless otherwise specified: -40°C < TAMB < 85°C, 4.5V < VCC < 5.5V, BST=VCC,SWN = GND = 0V, UVIN = 3.0V, CVCC =

10µF, CCOMP = 0.1µF, CGH = CGL = 3.3nF, CSS = 50nF, Typical measured at VCC=5V. The ♦ denotes the specifications

which apply over the full operating temperature range, unless otherwise specified.

These are stress ratings only and functional operation of the device at

these ratings or any other above those indicated in the operation sections

of the specifications below is not implied. Exposure to absolute maximum

rating conditions for extended periods of time may affect reliability.

VCC .................................................................................................. 7V

BST ............................................................................................... 27V

BST-SWN ......................................................................... -0.3V to 7V

SWN ................................................................................... -1V to 20V

GH ......................................................................... -0.3V to BST+0.3V

GH-SWN ......................................................................................... 7V

All other pins .......................................................... -0.3V to VCC+0.3V

Peak Output Current < 10us

GH,GL ............................................................................................. 2A

Storage Temperature .................................................. -65°C to 150°C

Power Dissipation .......................................................................... 1W

Lead Temperature (Soldering, 10 sec) ...................................... 300°C

ESD Rating .......................................................................... 2kV HBM

Thermal Resistance ............................................................. 41.9°C/W

ABSOLUTE MAXIMUM RATINGS

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