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參數(shù)資料
| 型號(hào)： | LP3891ET-1.8 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | 0.8A Fast-Response Ultra Low Dropout Linear |
| 中文描述： | 1.8 V FIXED POSITIVE LDO REGULATOR, 0.4 V DROPOUT, PZFM5 |
| 封裝： | MOLDED, STAGGER BEND, TO-220, 5 PIN |
| 文件頁數(shù)： | 4/12頁 |
| 文件大?。?/td> | 307K |
| 代理商： | LP3891ET-1.8 |
Electrical Characteristics
Limits in standard typeface are for T
J
= 25C, and limits in
boldface type
apply
over the full operating temperature range. Unless otherwise specified: V
IN
= V
O
(NOM) + 1V, V
BIAS
= 4.5V, I
L
= 10 mA, C
IN
=
C
OUT
= 10 μF, V
S/D
= V
BIAS
. (Continued)
Symbol
Parameter
Conditions
Typical
(Note 4)
MIN
(Note
5)
MAX
(Note
5)
Units
AC Parameters
PSRR (V
IN
)
Ripple Rejection for V
IN
Input
Voltage
V
IN
= V
OUT
+1V, f = 120 Hz
80
dB
V
IN
= V
OUT
+ 1V, f = 1 kHz
V
BIAS
= V
OUT
+ 3V, f = 120 Hz
65
PSRR
(V
BIAS
)
Ripple Rejection for V
BIAS
Voltage
70
V
BIAS
= V
OUT
+ 3V, f = 1 kHz
f = 120 Hz
BW = 10 Hz 100 kHz, V
OUT
=
1.8V
BW = 300 Hz 300 kHz, V
OUT
= 1.8V
65
1
Output Noise Density
Output Noise Voltage
μV/rootHz
e
n
150
μV (rms)
90
Note 1:
Absolute maximum ratings indicate limits beyond which damage to the component may occur. Operating ratings indicate conditions for which the device
is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications, see Electrical Characteristics. Specifications do not
apply when operating the device outside of its rated operating conditions.
Note 2:
At elevated temperatures, device power dissipation must be derated based on package thermal resistance and heatsink thermal values.
θ
J-A
for TO-220
devices is 65C/W if no heatsink is used. If the TO-220 device is attached to a heatsink, a
θ
J-S
value of 4C/W can be assumed.
θ
J-A
for TO-263 devices is
approximately 40C/W if soldered down to a copper plane which is at least 1.5 square inches in area. If power dissipation causes the junction temperature to exceed
specified limits, the device will go into thermal shutdown.
Note 3:
The human body model is a 100 pF capacitor discharged through a 1.5k resistor into each pin.
Note 4:
Typical numbers represent the most likely parametric norm for 25C operation.
Note 5:
Limits are guaranteed through testing, statistical correlation, or design.
Note 6:
If used in a dual-supply system where the regulator load is returned to a negative supply, the output pin must be diode clamped to ground.
Note 7:
Output voltage line regulation is defined as the change in output voltage from nominal value resulting from a change in input voltage.
Note 8:
Output voltage load regulation is defined as the change in output voltage from nominal value as the load current increases from no load to full load.
Note 9:
Dropout voltage is defined as the minimum input to output differential required to maintain the output with 2% of nominal value.
Note 10:
The machine model is a 220 pF capacitor discharged directly into each pin. The machine model ESD rating of pin 5 is 100V.
L
www.national.com
4
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| LP3892EMR-1.2 | 功能描述:低壓差穩(wěn)壓器 - LDO 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(dòng)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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| LP3892EMR-1.5 | 功能描述:低壓差穩(wěn)壓器 - LDO 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(dòng)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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