RT9226A Просмотр технического описания (PDF) - Richtek Technology
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RT9226A Datasheet PDF : 6 Pages
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RT9226A
Pin Description
Pin No. Pin Name
1
VSEN
2
OCSET
3
SS
4
FB
5
EN
6
GND
7
PGNDH
8
PGOOD
9
PHASE
10
UGATE
11
BOOT
12
PGNDL
13
LGATE
14
VCC
Pin Function
Output voltage monitoring input
Current limit set pin with 200µA current sink
Soft start, connect a capacitor from this pin to GND
Voltage-control feedback loop input
Regulator enable with low shutdown
Ground
High side drive GND
Power good indication output
Current limit sense
High side MOSFET driver output
Driver power
Low side driver GND
Low side MOSFET driver output
IC power
Typical Application Circuit
12V
R1
10Ω
D1
15V
C1
1µF 14
11
C2; 1000pF
BOOT
VCC OCSET
2
Low Shutdown
5 EN
3 SS
R2; 2.4k
UGATE 10
Q1
C3
0.1µF
12 PGNDL PHASE 9
6
7
8
GND
PGNDH
PGOOD
LGATE 13
FB 4
VSEN 1
Q2
L1
C6
1µF
+
-
1µH
C4
1000µF×2
L2
D2 7µH
1N5817
+ C5
- 1000µF×6
RT9226A
R4
1K 1%
R3
1K 1%
Power Good
R5
10K 1%
VIN 5V
VOU T
2.5V/10A
C4, C5: Each 1000µF 6.3WV DC, Sanyo MV-GX or Equivalent.
L1: Core: Micrometals T50-52; Winding: 5 turns of 18 AWG.
L2: Core: Micrometals T60-52; Winding: 14 turns of 17 AWG.
Q1, Q2: CET6030L
www.richtek-ic.com.tw
4
DS9226A-03 July 2000
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