LX8941 Microsemi Corporation, LX8941 Datasheet - Page 3

• Manufacturer Part Number: LX8941
• Description: Adjustable Low Dropout Regulator
• Manufacturer: Microsemi Corporation

Copyright © 2001
Rev. 0.7a, 2005-11-10
Unless otherwise specified, the following specifications apply over the operating ambient temperature of 0°C to 125°C for the LX8941CP;
V
junction and case temperatures equal to the ambient temperature. Note 3: The output voltage range is 4 to 25V and is determined by the
two external resistor, R1 and R2. See Product Highlight.
Enable Logic Section
Note 4: These parameters although guaranteed, are not tested in production.
IN
ADJ Pin Voltage (Note 3)
Line Regulation
Load Regulation
Dropout Voltage
Quiescent Current
Adjust Pin Current
Current Limit
Output Noise Voltage (Note 4)
Long Term Stability (Note 4)
Ripple Rejection (Note 4)
On Threshold Voltage
On Threshold Current
Off Threshold Voltage
Off Threshold Current
= 10V, I
TM
0.1µF
O
Parameter
C1*
OFF
= 1A, C
ON
OUT
ON /
OFF
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
= 22µF and are for DC characteristics only. Low duty cycle pulse testing techniques are used which maintain
E L E C T R I C A L C H A R A C T E R I S T I C S
Shutdown
Symbol
Thermal
V
S I M P L I F I E D B L O C K D I A G R A M
∆V
V
∆V
I
O RMS
∆V
R
I
ADJ
I
ADJ
CL
Q
R
OL
OI
V
INPUT
VOLTAGE
Figure 1 – Simplified Block Diagram
IN
ON / OFF
Circuit
Integrated Products Division
I
V
50mA < I
I
I
I
I
I
I
V
V
10Hz – 100kHz, IO = 5mA
f
O
O
O
O
O
O
O
O
O
IN
IN
= 0A, T
= 100mA
= 500mA
= 1A
= < 5mA, 7 < V
= 500mA
= 1000mA
= 120Hz, 1V
+ 2V < V
= 10V, I
= 26V
®
Microsemi
O
A
< 1A, V
= 25°C
O
IN
= 1A
< 26V, I
RMS
Test Conditions
IN
, I
O
< 26V
O
= V
= 100mA
Adjustable Low Dropout Regulator
O
ADJ
= 5mA
LX8941
+
-
P
RELIMINARY
GND
ADJ
V
O
D
1.225
Min
ATA
-10
1
2
10µF
C2
S
LX8941
HEET
1.25
Typ
-0.3
150
275
400
115
150
1.2
0.1
10
30
20
66
OUTPUT
VOLTAGE
1
3
2
1.275
Max
300
500
800
180
0.8
50
50
15
50
20
50
LX8941
1000hr
µV
Units
mV /
mV
mV
mV
mV
mV
mA
mA
mA
µA
dB
µA
µA
V
A
V
V
RMS
Page 3