SP6134 Datasheet, PDF (2/14 Pages) Sipex Corporation – Dual Supply Synchronous Buck Controller

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 ............................................................................................... 22V
BST-SWN ......................................................................... -0.3V to 7V
SWN ................................................................................... -1V to 15V
GH ......................................................................... -0.3V to BST+0.3V
GH-SWN ......................................................................................... 7V
All other pins .......................................................... -0.3V to VCC+0.3V
ABSOLUTE MAXIMUM RATINGS
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
ELECTRICAL SPECIFICATIONS
Unless otherwise specified: 0°C < T_AMB < 70°C, 4.5V < V_CC < 5.5V, BST=V_CC,SWN = GND = 0V, UVIN = 3.0V, CV_CC = 10µF,
C_COMP = 0.1µF, CGH = CGL = 3.3nF, C_SS = 50nF, Typical measured at V_CC=5V. The ♦ denotes the specifications which
apply over the full operating temperature range, unless otherwise specified.
PARAMETER
MIN TYP MAX UNITS ♦ CONDITIONS
QUIESCENT CURRENT
V_CC Supply Current
BST Supply Current
PROTECTION: UVLO
1.5
3
mA
V_FB =0.9V (No switching)
0.2
0.4 mA ♦ V_FB =0.9V (No switching)
V_CC UVLO Start Threshold
V_CC UVLO Stop Threshold
4.00 4.25
4.5
V
♦
3.80 4.05
4.4
V
♦
V_CC UVLO Hysteresis
100 200 300 mV
UVIN Start Threshold
2.3 2.5
2.65
V
♦
UVIN Stop Threshold
2.0 2.2
2.35
V
♦
UVIN Hysteresis
300
mV
ERROR AMPLIFIER REFERENCE
Error Amplifier Reference
0.792 0.800 0.808 V
2X Gain Config., Measure COMP/2
Error Amplifier Reference
Over Line and Temperature
0.788 0.800 0.812 V
♦
Error Amplifier Transconductance
6
ms
Error Amplifier Gain
60
dB
No Load
COMP Sink Current
150
µA
V_FB = 0.9V, COMP = 0.9V
COMP Source Current
150
µA
V_FB = 0.7V, COMP = 2.2V
V_FB Input Bias Current
50
200 nA ♦ V_FB = 0.8V
Internal Pole
4
MHz
COMP Clamp
COMP Clamp Temp. Coefficient
2.5
V
V_FB=0.7V, T_A = 25°C
-2
mV/°C
CONTROL LOOP: PWM COMPARATOR, RAMP & LOOP DELAY PATH
Ramp Amplitude
0.92 1.1
1.28
V
♦
RAMP Offset
1.1
V
T_A = 25°C, RAMP COMP
until GH starts switching
RAMP Offset Temp. Coefficient
-2
mV/°C
GH Minimum Pulse Width
90
180 ns ♦
Maximum Controllable Duty Ratio
92
97
% ♦ Maximum Duty Ratio Measured just
before pulse skipping begins
Maximum Duty Ratio
100
%
Valid for 20 Cycles
Internal Oscillator Frequency
540 600
510 600
660 kHz ♦
690
Date: 5/25/04
SP6134 Dual Supply, Synchronous Buck Controller
2
© Copyright 2004 Sipex Corporation