SP6136 Datasheet, PDF (3/18 Pages) Sipex Corporation – Synchronous Buck Controller

ELECTRICAL SPECIFICATIONS
Unless otherwise specified: -40°C < T_AMB < +85°C, 4.5V < V_CC < 5.5V, BST=V_CC,SWN = GND = PGND = 0.0V, UV_IN = 3.0V,
CV_CC = 0.1µF, C_COMP = 0.1µF, CGH = CGL = 3.3nF, C_SS = 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 520 600 680 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
250 500 750
Power Good Output
Power Good Threshold
-10 -7.5 -5
V
VIN = 6 to 23V,
ILOAD = 0mA to 30mA
mV IVCC = 30mA
%
Power Good Hysteresis
2.0 4.0
%
Power Good Sink Current
1.0
10
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
0
3.3
Hiccup Timeout
90 110 130
Thermal Shutdown
Temperature
135 145 155
Thermal Hysteresis
10
3.3
mA
VFB = 0.7V,
VPWRGD = 0.2V
V
Measured VREF
(0.8V) - VFB
mV Measured ISP - ISN
V
ms
˚C
˚C
Oct 31-06 Rev L
SP6136 Synchronous Buck Controller

© 2006 Sipex Corporation