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參數(shù)資料
| 型號(hào)： | TK73200M |
| 廠商： | TOKO Inc. |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection |
| 中文描述： | 無(wú)電容，NMOS管，150mA的低壓差穩(wěn)壓器的反向電流保護(hù) |
| 文件頁(yè)數(shù)： | 9/12頁(yè) |
| 文件大?。?/td> | 92K |
| 代理商： | TK73200M |
June 1999 TOKO, Inc.
Page 9
TK73200
EVALUATION BOARD
SOT23L-8 BOARD LAYOUT
PULSE CURRENT LIMIT MODE
The equation for the pulse output current limit is as follows:
I
SET
(mA) = 90 (mV) / R
IPK
(
)
During the initial turn-on, charge (surge) current flows to
the output capacitor. This IC has a possibility for the
current limit to operate and to turn off the output by the
charge current of the output capacitor. Therefore, the
relationship between C
L
and C
P
is set as shown in the
graph below:
CP
CN
VIN
COLLECTOR
BASE
EMITTER
RP
330 k
VOUT
VCONT
CL
RIPK
CIN
GND
TEXTERNAL
TK73200
R1
R2
VOUT
IOUT
APPLICATION INFORMATION
INPUT-OUTPUT CAPACITORS
The output capacitor is necessary for stable operation.
The regulator may oscillate if the output capacitor is too
small or missing. The output capacitor size is determined
by load, transient response and external transistor used.
Evaluation in the circuit is recommended to ensure
performance requirements are satisfied. A minimum of 4.7
μ
F is necessary for stability, with twice that value
recommended. The minimum recommended input
capacitor is 1
μ
F. Problems do not occur with larger values
of capacitance. However, extremely low ESR may result
in unstable operation. Thus, the use of large value ceramic
capacitors is not recommended on the output.
A
T
V
OUT
GND
CON
V
IN
CL
TK73200
1
External
Transistor
1
4.7
μ
F
R1
R2
RIPK
CIN
1
μ
F
CP
0.1
μ
F
CN
0.1
μ
F
330k
RP
C
CP (μF)
100
1000
10
10
0.1
0.01
STABLE REGION
1
1
A
T
V
OUT
GND
CON
V
IN
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| TK73200MCL | 制造商:TOKO 制造商全稱:TOKO, Inc 功能描述:ADJUSTABLE LOW DROPOUT REGULATOR |
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| TK73211MCLH | 制造商:TOKO 制造商全稱:TOKO, Inc 功能描述:LOW DROPOUT REGULATOR |
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