SP6136 Datasheet, PDF (4/18 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 = PGND = GND = 0.0V, U_VIN = 3.0V, CV_CC
= 0.1µF, C_COMP = 0.1µF, CGH = CGL = 3.3nF, C_SS = 50nF.
PARAMETER
MIN TYP MAX UNITS
OUTPUT: NFET GATE DRIVERS
GH & GL Rise Times
35 50 ns
GH & GL Fall Times
30 40 ns
GL to GH Non Overlap Time
45 70 ns
SWN to GL Non Overlap
Time
GH & GL Pull Down
Resistance
Driver Pull Down Resistance
Driver Pull Up Resistance
25 40 ns
15 50 85 KΩ
1.5 1.9
Ω
2.5 3.9
Ω
CONDITIONS
Measured 10% to 90%
Measured 90% to 10%
GH & GL Measured at
2.0V
Measured SWN =
100mV to GL = 2.0V
Block Diagram
VFB ⁴
VCC
10 uA
SOFTSTART INPUT
SS 8
VCC
5 COMP
VFBINT
VCC
Gm ERROR AMPLIFIER
Gm
VPOS
0.1V
POS REF
FAULT
PW M LO O P
SS
1.6 V
NON SYNCH. STARTUP
COMPARATOR
GL HOLD OFF
FAULT
RESET
DOMINANT
R
Q
S
QPWM
SYNCHRO NO US
DRI VER
FAULT
VCC 16
REFERENCE
CORE
0.8V
REF OK
4.25 V ON
4.05 V OFF
VCC UVLO
5V
LINEAR
REGULATOR
VIN 14
UVIN 15
140KΩ
2.50 V ON
2.20 V OFF
50KΩ
VIN UVLO
UVLO CO MPARATORS
2.8 V
POWER FAULT
RAMP = 1V
1.3 V
600 kHZ
CLK
CLOCK PULSE GENERATOR
VCC
1 uA
EN 6
1.7V ON
1.0V OFF
ENABLE
COMPARATOR
FAULT
145ºC ON
135ºC OFF
THERMAL
SHUTDOWN
VPOS
VFBINT
0.25V
SHORT CIRCUIT
DETECTION
OVER CURRENT
DETECTION
SET
DOMINANT
S
Q
R
HICCUP FAULT
CLK
100ms Delay COUNTER
CLR
60 mV
10
9
ISP
ISN
REF OK
THERMAL AND O VER CURRENT PROTECTIO N
VFB
0.74 V ON
0.72 V OFF
Power Good
13 BST
12 GH
11 SWN
1 GL
2 PGND
3 GND
7 PWRGD
Oct 31-06 Rev L
SP6136 Synchronous Buck Controller

© 2006 Sipex Corporation