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參數(shù)資料
| 型號： | TK732XX |
| 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： | 無電容，NMOS管，150mA的低壓差穩(wěn)壓器的反向電流保護(hù) |
| 文件頁數(shù)： | 11/16頁 |
| 文件大?。?/td> | 117K |
| 代理商： | TK732XX |
January 1999 TOKO, Inc.
Page 11
TK732xx
3)
4)
Plot P
D1
against 25
°
C
Connect P
D1
to the point corresponding to the 150
°
C
with a straight line.
In design, take a vertical line from the maximum
operating temperature (e.g., 75
°
C) to the derating
curve.
Read off the value of P
D
against the point at which the
vertical line intersects the derating curve. This is taken
as the maximum power dissipation, D
PD
.
5)
6)
The maximum operating current is:
I
OUT
= (D
PD
/ (V
IN(MAX)
-
V
OUT
)
SOT-23L-8 POWER DISSIPATION CURVE
VIN
RIPK
CONTROL
GND
GND
VOUT
DEFINITIONS AND TERMS (CONT.)
0 50 100 150
TA (
°
C)
P
0
450
750
150
300
600
MOUNTED AS
SHOWN
FREE AIR
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.
BOARD LAYOUT
SOT-23L-8 BOARD LAYOUT
APPLICATION INFORMATION
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