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SS7529CSTR Datasheet(PDF) 3 Page - Silicon Standard Corp.

Part # SS7529CSTR
Description  Synchronous Buck PWM and Linear Power Controller
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Manufacturer  SSC [Silicon Standard Corp.]
Direct Link  http://www.siliconstandard.com
Logo SSC - Silicon Standard Corp.

SS7529CSTR Datasheet(HTML) 3 Page - Silicon Standard Corp.

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SS7529
Rev.1.01 4/26/2004
PIN DESCRIPTIONS
PIN
NAME
FUNCTION
1
LGATE
Connect LGATE pin to the PWM converter’s lower MOSFET gate. This pin provides the gate
drive for the lower MOSFET.
2
PGND
Power ground
return
3
GND
Signal and power ground for the IC. All voltage levels are measured with respect to this pin.
4
5VCC
Connect this pin to 5V supply voltage. This pin provides the bias for the control circuitry. The
voltage at this pin is monitored for Power-On Reset (POR) purposes.
5
DRIVE2
This pin is the output of the linear controller. Connect this pin to the gate of an external
N-MOSFET to provide output power.
6
FB2
This pin is the inverting input of the internal error amplifier for the linear regulator output. Connect
this pin to the output of the converter via an external resistor divider.
7
NC
Not connected
8
NC
Not connected
9
FB
This pin is the inverting input of the internal error amplifier for the switching buck converter.
Connect this pin to the output of the converter via an external resistor divider.
10
COMP
Error amplifier output
11
NC
Not connected
12
NC
Not connected
13
12VCC
Connect this pin to the 12V supply voltage. This pin provides the bias for the driver circuitry. The
voltage at this pin is monitored for Power-On Reset (POR) purposes.
14
UGATE
Connect the UGATE pin to the PWM converter’s upper MOSFET gate. This pin provides the gate
drive for the upper MOSFET.
ABSOLUTE MAXIMUM RATINGS
Supply Voltage 5Vcc.………………………………………………………………..…. -0.3 ~ 7V
Supply Voltage 12Vcc …………………………………………………………………
-0.3 ~ 14V
UGATE, LGATE, DRIVE2 …………………………………………………………………
-0.3 ~12Vcc
FB, FB2, COMP ……………………………………………………………………………
-0.3 ~ 5Vcc+0.3
Operating Temperature Range………………………………………………..…………
0
oC to 70oC
Storage Temperature Range………………………………………………………..……
–65
oC to 150oC
Junction Temperature………………………………………………………….…………
0
oC to 125oC
Package thermal resistance SO-14.……………………………………………………
68
oC/W
Lead temperature (Soldering, 10sec)…………………………………………………..
300
oC
Caution:
Stresses beyond the ratings specified in “Absolute Maximum ratings” may cause permanent damage to the device. This
is a stress-only rating and the device should not be operated at these, or any other conditions above those indicated in the
operational sections of this specification.
ELECTRICAL CHARACTERISTICS
(TA = +25
oC unless otherwise stated, Vcc=5.0V)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Vcc Supply Voltage
12Vcc
10.8
12
13.2
V
5Vcc
4.5
5.0
5.5
V
Vcc Supply Current
Nominal Supply Current 12Vcc
UGATE and LGATE open
1.3
mA
Nominal Supply Current 5Vcc
UGATE and LGATE open
1.0
mA


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