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GM3255 डेटा पत्रक PDF( Datasheet डाउनलोड )


डेटा पत्रक - DC-DC CONVERTOR BOOST REGULATOR - Gamma

भाग संख्या GM3255
समारोह DC-DC CONVERTOR BOOST REGULATOR
मैन्युफैक्चरर्स Gamma 
लोगो Gamma लोगो 
पूर्व दर्शन
1 Page
		
<?=GM3255?> डेटा पत्रक पीडीएफ

GM3255 pdf
MARKING INFORMATION & PIN CONFIGURATIONS (TOP VIEW) SOP-8 & NSOP-8
PGND
VSW
AGND
VCC
8765
GM3255
AYWW
12 34
A = Assembly Location
Y = Year
W W = Work Week
VC SS
FB Test
Ordering Number
GM3255S8T
GM3255S8R
GM3255NS8T
GM3255NS8R
Package
SOP - 8
SOP - 8
NSOP - 8
NSOP - 8
* For detail Ordering Number identification, please see last page.
Shipping
100 Units / Tube
2,500 Units / Tape & Reel
100 Units / Tube
2,500 Units / Tape & Reel
PIN DESCRIPTION
PIN NUMBER
1
2
3
4
5
6
7
8
PIN SYMBOL
VC
FB
Test
SS
VCC
AGND
PGND
VSW
FUNCTION
Loop compensation pin. The VC pin is the output of the error amplifier and is used for
loop compensation, current limit and start. Loop compensation can be implemented
by a simple RC network as shown in the application diagram on page 2 as R1 and C1.
Positive regulator feedback pin. This pin senses a positive output voltage and is
referenced to 1.276V. When the voltage at this pin falls below 0.4 V, chip switching
frequency reduces to 20% of the nominal frequency.
These pins are connected to internal test logic and should either be left floating or tied to
ground. Connection to a voltage between 9.5V and 15V shuts down the internal oscillator
and leaves the power switch running.
Synchronization and shutdown pin. This pin may be used to synchronize the part to
nearly twice the base frequency. ATTL low shut the part down and put it into low current
mode. If synchronization is not used, this pin should be either tied high or left floating for
normal operation.
Input power supply pin. This pin supplies power to the part and should have a bypass
capacitor connected to AGND.
Analog ground. This pin provides a clean ground for the controller circuitry ans should
not be in the path of large currents. The output voltage sensing resistors should be
connected to the IC substrate.
Power ground. This pin is the ground connection for the emitter of the power switching
transistor. Connection to a good ground plane is essential.
High current switch pin. This pin connects internally to the collector of the power switch.
The open voltage across the power switch can be as high as 40V. To minimize radiation,
use a trace as short as practical.
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Package Thermal Resistance
Junction-to-Case, RqJC
junction-to-Ambient, RqJC
Junction Temperature Range, TJ
Storage Temperature Range, TSTG
Lead Temperature (Peak)
(reflow - soldering 60 sec. maximum above
183°C)
ESD, Human Body Model
VALUE
45
165
-40 to +150
-65 to +150
230
1.2
UNITS
°C / W
°C / W
°C
°C
°C
kV
2 * The maximum package power dissipation must be observed.

विन्यास 19 पेज
डाउनलोड[ GM3255 Datasheet.PDF ]


शेयर लिंक


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