SP6138 View Datasheet(PDF) - Signal Processing Technologies
Part Name
Description
Manufacturer
SP6138 Datasheet PDF : 17 Pages
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ELECTRICAL SPECIFICATIONS
Unless otherwise specified: -40°C < TAMB < +85°C, 4.5V < VCC < 5.5V, BST=VCC,SWN = PGND = GND = 0.0V, UVIN = 3.0V, CVCC
= 0.1µF, CCOMP = 0.1µF, CGH = CGL = 3.3nF, CSS = 50nF.
PARAMETER
MIN TYP
OUTPUT: NFET GATE DRIVERS
GH & GL Rise Times
35
GH & GL Fall Times
30
GL to GH Non Overlap
Time
45
SWN to GL Non Overlap
Time
25
GH & GL Pull Down Re-
sistance
15 50
Driver Pull Down Resistance
1.5
Driver Pull Up Resistance
2.5
MAX
50
40
70
40
85
1.9
3.9
UNITS
ns
ns
ns
ns
KΩ
Ω
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 LOOP
SS
1.6 V
NON SYNC. STARTUP
COMPARATOR
GL HOLD OFF
FAULT
RESET
DOMINANT
R
Q
S
QPWM
SYNCHRO NO US
DRI V E R
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
2.5 MHZ
2.8 V
POWER FAULT
RAMP = 1V
1.3 V
CLK
CLOCK PULSE GENERATOR
EN 6
VCC
1 uA
1.7V ON
1.0V OFF
ENABLE
COMPARATOR
FAULT
145ºC ON
135ºC OFF
VPOS
VFBINT
0.25V
60 mV
10
9
ISP
ISN
THERMAL
SHUTDOWN
SHORT CIRCUIT
DETECTION
OVER CURRENT
DETECTION
SET
DOMINANT
S
Q
R
HICCUP FAULT
100ms Delay
COUNTER
CLR
REF OK
THERMAL AND OVER CURRENT PRO TECTION
CLK
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 24-06 Rev J
SP6138 Synchronous Buck Controller
© 2006 Sipex Corporation
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