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参数资料
| 型号： | TPPM0115D |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 0.5 A SWITCHING CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | GREEN, PLASTIC, SOIC-8 |
| 文件页数： | 13/13页 |
| 文件大小： | 239K |
| 代理商： | TPPM0115D |
TPPM0115
SWITCH MODE SYNCHRONOUS BUCK CONTROLLER
SLVS371A MARCH 2001 REVISED JUNE 2001
9
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
1-V Ref
VCC
20 k
VDD
1
F
12 V
Supply
PWRGD
TPPM0115
DRVH
PHASE
DRVL
GND
SEN
4
H
Optional
0.1
F
4.7
F
1 V to 2.5 V
0.1
F
4.7
F
5 V
1.7
H
NOTES: A. The heavy lines must be kept short and connected to the ground plane construction for efficient results.
B. The feedback (sense) trace should be kept from the inductor flux.
C. The 1500-
F capacitor should have a low ESR to minimize output voltage ripple.
D. External FETs are MTD3302 or PHD55N03LT.
E. Set the resistor values on the SEN terminal using the following formulas:
F. Maximum efficiency is dependent on proper selection of external components.
G. Line and load regulation is dependent on proper selection of external components.
Optional: When resistor feedback network is not used, VOUT must be connected directly to SEN input to provide output regulation at
VOUT = Vref.
4.7
F
2200
F
2200
F
680 pF
R1
R2
1500
F
Low ESR
1500
F
Low ESR
VOUT
V
OUT +
V
ref
(R1
) R2)
R2
,
where V
ref +
1V
2.2
4.7 nF
Figure 8. Typical Application Schematic
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