GQ2181 Datasheet PDF - GTM

www.Datasheet-PDF.com

GQ2181
GTM

Part Number GQ2181
Description CMOS POSITIVE VOLTAGE REGULATOR
Page 5 Pages


GQ2181 datasheet pdf
Download PDF
GQ2181 pdf
View PDF for Mobile


No Preview Available !

www.DataSheet4U.com
ISSUED DATE :2005/12/12
REVISED DATE :
GQ2181
CMOS Po siti ve Vol tag e Regu l ato r
Description
The GQ2181 series of positive, linear regulators feature low quiescent current (50 A typ.) with low dropout
voltage and excellent PSRR, thus making them ideal for Telecommunications and other battery applications.
These rugged devices have both Thermal Shutdown, and Current Fold-back to prevent device failure under
the “Worst” of operating conditions.
As an additional feature, the GQ2181 is stable with an output capacitance of just extended 0.22 F or greater.
Features
Very Low Dropout Voltage
Guaranteed 150mA output
Over-Temperature Shutdown
Current Limiting
Short Circuit Current Fold-back
Excellent PSRR Type 70dB
Noise Reduction Bypass Capacitor
Power-saving Shutdown Mode
Factor Pre-set Output Voltage
Applications
Battery Powered Widgets
Instrumentation
Wireless Devices
PC Peripherals
Portable Electronics
Cordless Phones
Electronic Scales
Cellular Phones
Cameras
Telecommunications
Package Dimensions
Functional Block Diagram
Typical Application Circuit
REF.
A
B
C
D
E
F
Millimeter
Min. Max.
2.70 3.10
2.60 3.00
1.40 1.80
0.30 0.55
0 0.10
0° 10°
REF.
G
H
I
J
K
L
Dimensions
Millimeter
1.90 REF.
1.20 REF.
0.12 REF.
0.37 REF.
0.60 REF.
0.95 REF.
1/5



No Preview Available !

ISSUED DATE :2005/12/12
REVISED DATE :
Absolute Maximum Ratings
Parameter
Input Max Voltage
Symbol
VIN
Ratings
6
Unit
V
Output Current
Output Voltage
Operating Ambient Temperature
IOUT
VOUT
Topr
PD/( VIN- VO)
1.5~3.3
-40 ~ +85
mA
V
Junction Temperature
Tj -40 ~ +125
Maximum Junction Temperature
Power Dissipation( T=100 )
Tj Max
PD
150
380
mW
EDS Classification
B
Electrical Characteristics TA=25 unless otherwise noted
(VOUT(T)>2.0V VIN=VOUT(T)+0.5V; VOUT(T) 2.0V VIN=VOUT(T)+1V; VSHDN=VIN, CIN=COUT=1uF)
Parameter
Symbol
Condition
Min
TYP
Max
Unit
Output Voltage
Current Limit
Fold-back Current
VOUT(E)
(Note1)
ILIM
IFB
IO=0.1mA, VOUT(T) 2.0V
IO=0.1mA, VOUT(T)<2.0V
IO=150mA
VO>800mV
VO=0V
-1.0
-1.5
VOUT(T)
(Note2)
-2.0
150 200
- 80
1.0
1.5
2.0
-
-
%
mA
A
Load Regulation
REGLOAD
VOUT>2.0V
IO=0.1 to 150mA VIN=VOUT(T)+0.5V
VOUT 2.0V
VIN=VOUT(T)+1V
-1 0.5
-2 -
1
2
%
Dropout Voltage
Quiescent Current
Ground Pin Current
VDROPOUT
IQ
IGND
IO=150mA
VOUT(T) 2.0V
VO=VOUT(E)-2% 1.8V VOUT(T)<2.0V
1.5V VOUT(T)<1.8V
VIN=5V, IO=0mA
VIN=5V, IO=1mA to150mA
-
-
-
-
-
300 500
700 1000
900 1300
60 -
50 -
mV
A
A
Line Regulation
Input Voltage
Over Temperature Shutdown
Over Temperature Hysterisis
Output Voltage
Temperature Coefficient
Power Supply Rejection
Output Voltage Noise
SHDN Input Threshold
SHDN Input Bias Current
Shutdown Supply Current
Shutdown Output Voltage
REGLINE
VIN
OTS
OTH
TC
PSRR
eN
VSHDNH
VSHDNL
ISD
VO,SD
IO=0.1mA, VOUT>2.0V
VIN=VOUT(T)+0.5V to 5.5V
IO=0.1mA, VOUT 2.0V
VIN=VOUT(T)+1V to 5.5V
-0.2
-0.4
Note3
-
-
-
Ro=100 ,Co=2.2mF, f=1kHz
f=10Hz~100kHz, Io=10mA, Co=2.2 F
VSHDN=0.8* VIN
VSHDN=0.6V
VIN=5V, EN=0v, or 5V
VIN=5V, VO=0V
Output Loading 1200 , Vo=0V
-
-
0.8* VIN
0
-
-
0
0.1
-
-
137
23
30
70
30
-
-
0.01
0.5
-
0.2
%
0.4
5.5 V
-
-
- ppm/
- dB
- Vrms
VIN V
0.6 V
-A
1A
0.4 V
Note 1: VOUT (E) =Effective Output Voltage (i.e. the output voltage when “VOUT(T)>2.0V VIN=VOUT(T)+0.5V; VOUT(T) 2.0V VIN=VOUT(T)+1V;
VSHDN=VIN” is provided at the VIN pin while maintaining a certain IOUT value).
2: VOUT (T) =Specified Output Voltage
3: VIN (MIN) =VOUT+VDROPOUT
2/5



No Preview Available !

ISSUED DATE :2005/12/12
REVISED DATE :
Ordering Information ( contd. )
Part Number
GQ2181-15
GQ2181-20
GQ2181-27
GQ2181-2H
GQ2181-32
Marking
1L152
XXXX
1L202
XXXX
1L272
XXXX
1L2H2
XXXX
1L322
XXXX
Output Voltage
1.5V
2.0V
2.7V
2.85V
3.2V
Part Number
GQ2181-18
GQ2181-25
GQ2181-28
GQ2181-30
GQ2181-33
Marking
1L182
XXXX
1L252
XXXX
1L282
XXXX
1L302
XXXX
1L332
XXXX
Output Voltage
1.8V
2.5V
2.8V
3.0V
3.3V
Detailed Description
The GQ2181 series of COMS regulators contain a PMOS pass transistor, voltage reference, error amplifier,
over-current protection, and thermal shutdown.
The P-channel pass transistor receives data from the error amplifier, over-current shutdown, and thermal
protection circuits. During normal operation, the error amplifier compares the output voltage to a precision
reference. Over-current and Thermal shutdown circuits become active when the junction temperature exceeds
150 , or the current exceeds 150mA. During thermal shutdown, the output voltage remains low. Normal
operation is restored when the junction temperature drops below 120 .
The GQ2181 switches from voltage mode to current mode when the load exceeds the rated output current.
This prevents over-stress. The GQ2181 also incorporates current fold-back to reduce power dissipation when
the output is short circuited. This feature becomes active when the output drops below 0.8 volts, and reduces
the current flow by 65%. Full current is restored when the voltage exceeds 0.8 volts.
External Capacitors
The GQ2181 is stable with an output capacitance to ground of 0.22 F or greater. Ceramic capacitors have the
lowest ESR, and will offer the best AC performance. Conversely, Aluminum Electrolytic capacitors exhibit the
highest ESR, resulting in the poorest AC response.
A second capacitor is recommended between the input and ground to stabilize Vin. The input capacitor should
be at least 1 F to have a beneficial effect.
A large capacitor improves the AC ripple rejection, but also makes the output come up slowly. This “Soft”
turn-on is desirable in some applications to limit turn-on surges.
All capacitors should be placed in close proximity to the pins. A “Quiet” ground termination is desirable. This
can be achieved with a “Star” connection.
Shutdown
When actively, pulled low, the PMOS pass transistor shuts off, and all internal circuits are powered down. In
this state, the quiescent current is less than 1 A. This pin behaves much like an electronic switch.
Characteristics Curve
3/5



No Preview Available !

ISSUED DATE :2005/12/12
REVISED DATE :
4/5



GQ2181 datasheet pdf
Download PDF
GQ2181 pdf
View PDF for Mobile


Related : Start with GQ218 Part Numbers by
GQ2181 CMOS POSITIVE VOLTAGE REGULATOR GQ2181
GTM
GQ2181 pdf

Index :   0   1   2   3   4   5   6   7   8   9   A   B   C   D   E   F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   X   Y   Z   

This is a individually operated, non profit site. If this site is good enough to show, please introduce this site to others.
Since 2010   ::   HOME   ::   Contact