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RC5054A Datasheet(Fiches technique) 3 Page - Fairchild Semiconductor

Numéro de pièce RC5054A
Description  Programmable Synchronous DC-DC Converter Controller for Low Voltage Microprocessors
Télécharger  13 Pages
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Fabricant  FAIRCHILD [Fairchild Semiconductor]
Site Internet  http://www.fairchildsemi.com
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 3 page
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PRODUCT SPECIFICATION
RC5054A
3
Absolute Maximum Ratings
Recommended Operating Conditions
Thermal Characteristics
NOTE:
1.
θJA is measured with the component mounted on an evaluation PC board in free air.
17
LGATE
Connect LGATE to the lower MOSFET gate. This pin provides the gate drive for the
lower MOSFET.
18
VCC
Provide a 12V bias supply for the chip to this pin.
19
OVP
The OVP pin can be used to drive an external SCR in the event of an overvoltage
condition.
20
RT
This pin provides oscillator switching frequency adjustment. By placing a resistor
(RT) from this pin to GND, the nominal 200KHz switching frequency is increased
according to the following equation:
Conversely, connecting a pull-up resistor (RT) from this pin to VCC reduces the
switching frequency according to the following equation:
Min.
Max.
Power Input Voltage, VIN
6V
Supply Voltage, VCC
+13.5V
Boot Voltage, VBOOT - VPHASE
+13.5V
VCC or I/O Voltage
GND -0.3V
VCC + 0.3V
ESD Classification
Class 2
Min.
Max.
Supply Voltage, VCC
+12V -10%
+12V +10%
Ambient Temperature Range
0
°C
70
°C
Junction Temperature Range
0
°C
125
°C
Parameter
Conditions
Min.
Typ.
Max.
Units
Thermal Resistance1
θJA
SOIC Package
SOIC Package
With 3in2 of Copper
110
86
°C/W
°C/W
Maximum Junction Temperature
Plastic Package
150
°C
Maximum Storage Temperature Range
-65
150
°C
Maximum Lead Temperature
Soldering 10s
300
°C
Pin Definitions (continued)
Pin Number Pin Names
Pin Function Description
F
S
200kHz
3.5
10
6
×
KHz x Kohm
[]
R
T Kohm
[]
------------------------------------------------------------
+
=
R
T to GND
(
)
F
S
200kHz
310
5
×
KHz x Kohm
[]
R
T Kohm
[]
--------------------------------------------------------
=
R
T to 12V
()




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