參數(shù)資料
型號： MAX8878EZK25-T
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 基準(zhǔn)電壓源/電流源
英文描述： Analog IC
中文描述： 2.5 V FIXED POSITIVE LDO REGULATOR, 0.12 V DROPOUT, PDSO5
封裝： SOT-23, 5 PIN
文件頁數(shù)： 2/4頁
文件大?。?/td> 57K
代理商： MAX8878EZK25-T
E
MAX 881R Evaluation K it
2
_______________________________________________________________________________________
Detailed Desc ription
J umper S elec tion
The 2-pin header, J U1, controls pin 5 (
SHDN
) on the IC.
Table 1 outlines the shunt positions for J U1.
The
POK
pad allows easy connection to an external
system. This output pulls low when the bias voltage has
reached 92.5% of its set value.
Output V oltage Adjustment
For output voltages other than -2V, install R1 to com-
plete the R1/R2 output voltage divider. R2 is a 100k
,
1% resistor. To maintain accuracy, use a 1% resistor for
R1. Use the following equations to calculate R1:
R1 = -R2 (2 x V
OUT
+ 1)
R1 = -100k
(2 x V
OUT
+ 1)
Capac itor S elec tion
Use capacitors with a low effective series resistance
(ESR), such as ceramic or surface-mount chip tantalum
types.
Output ripple with the supplied components is typically
1mVp-p. For lower output ripple, replace C4 with a
10μF ceramic capacitor such as the Taiyo Yuden
J MK316BJ 106ML or a 10μF tantalum such as the
Sprague 595D106X0010A2.
Table 1. JU1 Shunt Position
SHUNT POSITION
MAX881R FUNCTION
Open
Device enabled, or
apply signal to the
SHDN
pad
Closed
Device disabled
Figure 1. MAX881R EV Kit Schematic
C1+
C1-
NEGOUT
C3
1
μ
F
C1
1
μ
F
C2
1
μ
F
C4
4.7
μ
F
R1
OPEN
R2
100k
1%
R3
1M
R4
1M
POK
SHDN
1
2
3
4
5
10
9
8
7
6
SHDN
JU1
IN
V
IN
2.5V to 5.5V
N.C.
GND
GND
VOUT
VOUT
GND
J1
OUT
FB
MAX881R
U1
POK
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MAX8878EZK28-TG50 功能描述:低壓差穩(wěn)壓器 - LDO 150mA Linear Regulator RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
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