SP6128A Datasheet, PDF (2/10 Pages) Sipex Corporation – Low Voltage, Synchronous Step Down PWM Controller Ideal for 2A to 10A, Small Footprint, DC-DC Power Converters

V_CC, PV_CC ......................................................................................... 7V
BST .................................................................. 13.2V
BST-SWN .............................................................. 7V
SWN ............................................................ -1V to 7V
GH ............................................... -0.3V to BST +0.3V
GH-SWN ............................................................... 7V
All other pins ................................ -0.3V to V_CC + 0.3V
Peak Output Current < 10µs
GH,GL .................................................................. 2A
Storage Temperature ........................ -65°C to 150°C
Power Dissipation .............................................. 1.3W
ABSOLUTE MAXIMUM RATINGS
Junction Temperature, T_J ................................ 125°C
Lead Temperature (Soldering, 10 sec) ............ 300°C
ESD Rating. ................................................ 2kV HBM
Thermal Resistance θ_JC ............................. 31.7°C/W
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.
ELECTRICAL CHARACTERISTICS
Unless otherwise specified: -40°C < T_A < 85°C, 3.0V < PV_CC = V_CC < 5.5V, C_COMP = 22nF, CGH = CGL = 3.3nF, V_FB = 0.8V,
SWN = GND = 0V, typical value for design guideline only.
PARAMETER
MIN TYP MAX UNITS
CONDITIONS
QUIESCENT CURRENT
V_CC Supply Current
PV_CC Supply Current
V_CC Supply Current(Disabled)
PV_CC Supply Current (Disabled)
ERROR AMPLIFIER
0.5 1.0 mA
1 20 µA
30 60 µA
1 20 µA
Error Amplifier Transconductance
0.6
ms
COMP Sink Current
10 35 65 µA
COMP Source Current
10 35 65 µA
COMP Output Impedance
3
MΩ
V_FB Input Bias Current
Error Amplifier Reference
130 nA
0.788 0.8 0.812 V
OSCILLATOR & DELAY PATH
Internal Oscillator Frequency
270 300 330 kHz
Maximum Controlled Duty Cycle
90
%
Minimum Duty Cycle
0
%
Minimum GH Pulse Width
150 250 ns
CURRENT LIMIT
I_SET Pin Sink Current
10 12.5 15 µA
I_SET Current Temperature Coefficient
3400
ppm/°C
Current Limit Time Constant
15
µs
Overcurrent Comparator
Threshold Voltage
100 125 150 mV
Threshold Voltage Temperature
Coefficient
3400
ppm/°C
No Switching
No Switching, GH = Low
COMP=0V
COMP=0V
V_FB = 0.9V, COMP = 0.9V, No Faults
V_FB = 0.7V, COMP = 2V
Trimmed with Error Amp in Unity Gain
Loop in control - 100% DC Possible
Comp=0.7V
PV_CC > 4.5V, Ramp up COMP voltage
until GH starts switching
Temp = 25 °C
VI_SET - V_SWN, Temp = 25°C
Rev. 05/25/04
SP6128A Low Voltage, Synchronous Step Down PWM Controller
2
© Copyright 2004 Sipex Corporation