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SP6136 Scheda tecnica(PDF) 4 Page - Exar Corporation

Il numero della parte SP6136
Spiegazioni elettronici  Synchronous Buck Controller
PDF  18 Pages
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Produttore elettronici  EXAR [Exar Corporation]
Homepage  http://www.exar.com
Logo EXAR - Exar Corporation

SP6136 Scheda tecnica(HTML) 4 Page - Exar Corporation

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4
Oct 3-06 Rev L
SP636 Synchronous Buck Controller
© 2006 Sipex Corporation
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.µF, CCOMP = 0.µF, CGH = CGL = 3.3nF, CSS = 50nF.
PARAMETER
MIN TYP MAX UNITS
CONDITIONS
OUTPUT: NFET GATE DRIVERS
GH & GL Rise Times
35
50
ns
Measured 0% to 90%
GH & GL Fall Times
30
40
ns
Measured 90% to 0%
GL to GH Non Overlap Time
45
70
ns
GH & GL Measured at
2.0V
SWN to GL Non Overlap
Time
25
40
ns
Measured SWN =
00mV to GL = 2.0V
GH & GL Pull Down
Resistance
5
50
85
KΩ
Driver Pull Down Resistance
.5
.9
Ω
Driver Pull Up Resistance
2.5
3.9
Ω
BLOCk DIAGRAM
NON SYNCH. STARTUP
100ms Delay
600 kHZ
FAULT
0.1V
0.25V
SOFTSTART INPUT
135ºC OFF
145ºC ON
50KΩ
140KΩ
1.0V OFF
1.7V ON
4.05 V OFF
4.25 V ON
FAULT
R
FAULT
6
EN
1 uA
VCC
VCC
3 GND
ENABLE
COMPARATOR
COMPARATOR
1.6 V
SS
GL HOLD OFF
CLK
CLOCK PULSE GENERATOR
Q
S
RESET
DOMINANT
QPWM
SYNCHRONOUS
DRIVER
13
12
11
1
2 PGND
BST
7
9
10
15
14
16
8
5
2.8 V
1.3 V
RAMP = 1V
VFB
Power Good
PWRGD
0.72 V OFF
0.74 V ON
VPOS
THERMAL AND OVER CURRENT PROTECTION
UVLO COMPARATORS
VCC UVLO
HICCUP FAULT
REFOK
COUNTER
CLR
CLK
ISP
ISN
60 mV
OVER CURRENT
DETECTION
DETECTION
VFBINT
SHORTCIRCUIT
Q
DOMINANT
R
S
SET
SHUTDOWN
THERMAL
VIN
REFOK
CORE
0.8V
UVIN
VIN UVLO
2.50 V ON
2.20 V OFF
REGULATOR
LINEAR
5V
REFERENCE
POWER FAULT
VCC
POS REF
FAULT
VCC
SS
10 uA
VCC
VFBINT
4
VFB
GL
PWM LOOP
COMP
VPOS
Gm
Gm ERROR AMPLIFIER
GH
SWN



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