參數(shù)資料
型號： TLV1117-15IKCS
廠商： Texas Instruments, Inc.
元件分類： 基準(zhǔn)電壓源/電流源
英文描述： ADJUSTABLE AND FIXED LOW DROPOUT VOLTAGE REGULATORS
中文描述： 可調(diào)和固定低壓降穩(wěn)壓器
文件頁數(shù)： 11/20頁
文件大?。?/td> 503K
代理商： TLV1117-15IKCS
SLVS561A DECEMBER 2004 – REVISED MARCH 2005
11
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
10
μ
F
(see Note C)
100
μ
F
(see Note A)
R1
R2
INPUT
OUTPUT
ADJ/GND
TLV1117 ADJ
VO
VI
CADJ
(see Note B)
1N4002 (See Note D)
IADJ
VREF
Because IADJ typically is 55
μ
A, it is negligible in most applications.
V
OUT
V
REF
1
R2
R1
(
I
ADJ
R2
)
VOUT is calculated as:
NOTES: A. Output capacitor selection is critical for regulator stability. The recommended minimum is 10-
μ
F tantalum or 50-
μ
F aluminum
electrolytic, with either one having an ESR between 0.3
and 22
. Larger COUT values benefit the regulator by improving
transient response and loop stability.
B. CADJ can be used to improve ripple rejection. Ensure that the impedance of CADJ
prevent the ripple from being amplified. If CADJ is used, then a larger COUT is
required (22-
μ
F tantalum or 150-
μ
F aluminum electrolytic).
C. CIN is recommended if TLV1117 is not located near the power-supply filter.
D. An external diode is recommended to protect the regulator if the input instantaneously is shorted to GND.
is
<
R1 to
X
CADJ
1
2 f
ripple
C
ADJ
Figure 11. Basic Adjustable Regulator
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