600mA CMOS L.D.O. Regulator
LM8805
FEATURES
z Maximum output current : 600mA
z Highly accurate: Output voltage ±1.5%
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Stability with Low ESR Capacitors
Low power consumption
On-chip Protections: Thermal, Short Circuit
Small input/output differential: 600mV at 600mA
Adjustable version
SOT-23 5L PKG
APPLICATION
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Battery-Operated Systems
Portable Computers
Portable Cameras and Video Recorders
Reference Voltage Sources
Instrumentation
Pagers
SOT-89 3L PKG
DESCRIPSION
The LM8805 series is a low-dropout linear regulator.
There are devices designed specifically for batteryoperated systems. Ground current is very small (50uATyp), that significantly extending battery life. Low power
consumption and high accuracy is achieved through
CMOS and programmable fuse technologies. Output
voltage: 1.5V to 6.0V.
ORDERING INFORMATION
SOT-23-5L(300mW) and SOT-89(500mW) packages are
available.
Device
Package
LM8805SF5-XX
SOT-23-5L
LM8805F-XX
SOT-89
XX = Output Voltage = ADJ, 1.2V, 2.5V, 3.3V
Absolute Maximum Ratings
CHARACTERISTIC
SYMBOL
MIN.
MAX.
UNIT
Input Voltage
VIN
-
8
V
Output Current
IOUT
-
1
A
Output Voltage
VOUT
VSS -0.3
VIN +0.3
V
Storage Temperature Range
TSTG
-40
125
℃
TA
-40
125
℃
Operating Ambient Temperature
Aug. 2010 - Rev. 1.5.1
-1
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HTC
600mA CMOS L.D.O. Regulator
LM8805
Ordering Information
VOUT
ADJ
1.2 V
2.5 V
3.3 V
Package
Order No.
Description
Supplied As
Status
SOT-23 5L
LM8805SF5-ADJ
600mA, Enable, Adjustable
Reel
Active
SOT-23 5L
LM8805SF5-1.2V
600mA, Fixed
Reel
Contact us
SOT-89 3L
LM8805F-1.2V
600mA, Fixed
Reel
Contact us
SOT-23 5L
LM8805SF5-2.5V
600mA, Fixed
Reel
Active
SOT-89 3L
LM8805F-2.5V
600mA, Fixed
Reel
Active
SOT-23 5L
LM8805SF5-3.3V
600mA, Fixed
Reel
Active
SOT-89 3L
LM8805F-3.3V
600mA, Fixed
Reel
Active
LM 8805
Output Voltage : ADJ / 1.2V / 2.5V / 3.3V
Package Type
: SOT-23 5L
{ SF5
F
: SOT-89
Root Name
Product Code
PIN CONFIGURATION
VOUT
BYP/ADJ
5
4
1
VIN
2
GND
3
EN
SOT-23 5L
1
2
3
GND
VIN
VOUT
SOT-89 3L
PIN DESCRIPTION
SOT-23 5L
Pin No.
SOT-89 3L
Name
Function
Name
Function
1
VIN
Input Supply
GND
Ground
2
GND
Ground
VIN
Input Supply
3
EN
Enable
VOUT
Output Voltage
4
BYP/ADJ
Bypass for Fixed output or
Output adjust for Adjustable output
-
-
5
VOUT
Output Voltage
-
-
Aug. 2010 - Rev. 1.5.1
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HTC
600mA CMOS L.D.O. Regulator
LM8805
TYPICAL APPLICATION
Typical 3 Pin Application Circuit
VIN
VIN
VOUT
VOUT
LM8805-X.X
CIN
GND
COUT
Typical 5 Pin Application Circuit
- Output Adjustment (Adjustable version)
VIN
VIN
VOUT
VOUT
LM8805-ADJ
R2
CIN
EN
GND
COUT
ADJ
R1
VOUT = VADJ(1+R2/R1)
- Fixed Voltage Application
VIN
VIN
VOUT
VOUT
LM8805-X.X
CIN
EN
COUT
GND BYP*
CBYP
(Optional)
* Note) BYP pin can be left open if low noise operation is not required.
Aug. 2010 - Rev. 1.5.1
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HTC
600mA CMOS L.D.O. Regulator
LM8805
ELECTRICAL CHARACTERISTICS
(At TA =25℃, VIN = VOUT(nominal) + 1V, unless otherwise noted)
PARAMETER
Output Voltage Accuracy
Adjustable Voltage
line Regulation
Load Regulation
(Note 1)
Dropout Voltage
Maximum Output Current
Current Limit
SYMBOL
TEST CONDITION
MIN.
TYP.
MAX.
UNIT
+1.5
+2
%
VO
IO = 1mA
IO = 1 to 600mA
-1.5
-3
VADJ
IO = 1mA
IO = 1 to 600mA
1.251
1.232
1.27
1.289
1.295
V
-0.3
0.05
0.3
%/V
%
ΔVLINE
IO = 1mA, (VOUT+1V)<VIN<6.5V
ΔVLOAD
1mA ≤ IO ≤ 600mA, COUT = 1uF
0.5
1.5
VOUT > 2.8V, IO=600mA
600
1000
2.0V < VOUT ≤ 2.8V, IO=600mA
900
1400
VOUT ≤ 2.0V, IO=600mA
1300
1900
VDROP
IO(MAX)
VOUT > 0.96*VRating
600
ICL
EN Exit Delay
CBP = 0uF, COUT = 1uF
IO = 100mA
EN Input Bias Current
VEN = GND
EN Input Low Current
VEN = VIN
EN Supply Current
VEN = VIN
mA
1300
mA
600
usec
100
-1
mV
-0.3
0.01
nA
uA
1
uA
0.4
V
EN Input Threshold Low
VIL
VIN = 2.5 to 5.5V
EN Input Threshold High
VIH
VIN = 2.5 to 5.5V
Ground Pin Current
IGND
IOUT = 0mA to 600mA
50
Thermal Shutdown Temperature
TSD
IOUT = 10mA
155
℃
ΔTSD
IOUT = 10mA
10
℃
IOUT = 10mA
30
ppm
IOUT = 100mA, COUT = 2.2uF,
f = 100Hz
55
dB
Thermal Shutdown Hysterisis
VO Temperature Coefficient
Power Supply Ripple Rejection
PSRR
2
V
85
uA
Note 1. Load Regulation is measured using pulse techniques with duty cycle < 5%
OPERATING CHARACTERISTICS
T.B.D
APPLICATION INFORMATION
Detailed Description
The LM8805 consists of a high-precision voltage reference, an error correction circuit, and a current limited
output driver. With good transient responses, output remains stable even during load changes. The SHDN
input enables the output to be turned off, resulting in reduced power consumption.
The LM8805 incorporates both over-temperature and over-current protection.
Aug. 2010 - Rev. 1.5.1
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HTC
600mA CMOS L.D.O. Regulator
LM8805
External Capacitors
The LM8805 can stable work with cheap MLCC output Capacitor.
The LM8805 having high ripple rejection ratios, the series can be used with power supply noise. A 470pF
capacitor from the Bypass input to ground reduces noise present on the internal reference, which in turn
significantly reduces output noise. If output noise is not a concern, this input may be left unconnected. Larger
capacitor values Cbp be used, but results in a longer time period to rated output voltage when power is initially
applied.
Aug. 2010 - Rev. 1.5.1
-5
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HTC