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參數(shù)資料
| 型號(hào)： | LND2950 |
| 廠商： | Linear Integrated Systems |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | 100mA Low Dropout Voltage Regulators |
| 中文描述： | 100mA的低壓差穩(wěn)壓器 |
| 文件頁(yè)數(shù)： | 4/5頁(yè) |
| 文件大?。?/td> | 142K |
| 代理商： | LND2950 |
Note 1: Output or reference voltage temperature coefficients is defined as the worst case voltage change divided by
the total temperature range.
Note 2: Unless otherwise specified all limits guaranteed for T
j
=25oC, V
in
=V
o
+1V,I
L
=100μAand C
L
=1μF. Additional
conditions for the 8 pin versions are feedback tied to –XX V tap and output tied to output sense(V
out
=XX V) and V
shutdown
≤
0.8 V.
Note 3: Regulations is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes
in output voltage due to heating effects are covered under the specification for thermal regulation.
Note 4: Line regulation for LND2951-xx is tested at 150oCfor I
L
=1mA. For I
L =
100μA and Tj=125oC, line regulation is
guaranteed by design to 0.2%. See typical performance characteristics for line regulation verse temperature and load
current.
Note 5: Dropout voltage is defined as the input to output differential at which the output voltage drops 100mV below its
nominal value measured at 1V differential. At very low values of programmed output voltage, the minimum input
supply voltage of 2V(2.3V over temperature) must be taken into account.
Note 6: V
ref
≤
V
out
≤
(Vin-1V), 2.3V
≤
Vin
≤
30V,100μA
≤
I
L
≤
100mA,T
J
≤
T
JMAX
Note 7: Output or reference voltage temperature coefficient is defined as the worst case voltage change divided by the
total temperature range.
Note 8: Comparator thresholds are expressed in terms of a voltage differential at the feedback terminal below the
nominal reference voltage measured at V
O
+1V input. To express these thresholds in terms of output voltage change,
multiply by the error amplifier gain =V
out
/V
ref
=(R1+R2)/R2. For example, at a programmed output voltage of 5V, the
error output is guaranteed to go low when the output drops by 95mVx5V/1.235V=384mV. Thresholds remain constant
as a percent of V
out
as V
out
is varied, with the dropout warning occurring at typically 5% below nominal, 7.5%
guaranteed.
Note 9: V
shutdown
≥
2V,Vin
≤
30V,V
out
=0, Feed-back pin tied to –XX V tap.
LND2950 / LND2951
BLOCK DIAGRAM AND TYPICAL APPLICATIONS
APPLICATION HINTS
External Capacitors
A 1.0
μ
F (or greater ) capacitor is required between the output and the ground for stability at output
voltages of 5V or more. At lower output voltages, more capacitance is required. 2.2
μ
F or more is
recommended for 3 V and 3.3 V versions.
Programming the Output Voltage
The LND2951 may be pin-strapped for the nominal fixed output voltage. Alternatively it may be
programmed for any output voltage between 1.24 V and 29 V depending upon the requirements.
Linear Dimensions, Inc.
445 East Ohio Street, Chicago IL 60611 USA
tel 312.321.1810
fax 312.321.1830
www.lineardimensions.com
Vout
L
See
Application
Hints
OUTPUT
GROUND
INPUT
+
-
ERROR
AMPLIFIER
+
+
1.23 V
Unregulated DC
+
Vout
L
See
Application
Hints
SENSE
GROUND
INPUT
+
-
ERROR
+
FEEDBACK
+
-
60 mV
+
+
1.23 V
II
Error detection Comparator
OUTPUT
XX VTAP
ERROR
SHUTDOWN
From
or
TTL
To
or
TTL
Unregulated DC
330k
1
2
6
5
4
8
7
3
60k
+
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LND2951 | 100mA Low Dropout Voltage Regulators |
| LO481MBL4-B0P | Blue 110 oval LED lamp with tinted diffused lens and stand offs. |
| LO484NHR4-B0G | Red 100 Elliptical LED lamp with tinted diffused lens and stand offs. |
| LO484THR4-B0G | Red 100 Elliptical LED lamp with tinted diffused lens and stand offs. |
| LO484TYL4-B0G | Yellow 100 Elliptical LED lamp with tinted diffused lens and stand offs. |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LND2951 | 制造商:LINEAR_DIMENSIONS 制造商全稱:LINEAR_DIMENSIONS 功能描述:100mA Low Dropout Voltage Regulators |
| LND2951-2.85 | 制造商:LINEAR_DIMENSIONS 制造商全稱:LINEAR_DIMENSIONS 功能描述:100mA Low Dropout Voltage Regulators |
| LND2951-3.0 | 制造商:LINEAR_DIMENSIONS 制造商全稱:LINEAR_DIMENSIONS 功能描述:100mA Low Dropout Voltage Regulators |
| LND2951-3.3 | 制造商:LINEAR_DIMENSIONS 制造商全稱:LINEAR_DIMENSIONS 功能描述:100mA Low Dropout Voltage Regulators |
| LND2951-5.0 | 制造商:LINEAR_DIMENSIONS 制造商全稱:LINEAR_DIMENSIONS 功能描述:100mA Low Dropout Voltage Regulators |
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