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ISSUED DATE :2006/06/07
REVISED DATE :
GJ1118
0.8A Low Dropout Positive Adjustable or Fixed-Mode Regulator
Description
The GJ1118 is a low dropout at positive adjustable or fixed-mode regulator with minimum of 0.8A output
current capability. The product is specifically designed to provide well-regulated supply for low voltage IC
applications such as high-speed bus termination and low current 3.3V logic supply. GJ1118 is also well suited
for other applications such as VGA cards. GJ1118 is guaranteed to have lower than 1.3V dropout at full load
current making it ideal to provide well regulated outputs of 1.25V to 5.0V with up to 12V input supply.
Features
1.4Vmaximum dropout full load current
Fast transient response
Output current limiting
Built-in thermal shutdown
Good noise rejection
3-Terminal Adjustable or Fixed 1.5V,1.8V,2.5V,3.3V,5.0V
Applications
PC peripheral
Communication
Package Dimensions
TO-252
Typical Circuit
REF.
A
B
C
D
E
F
S
Millimeter
Min. Max.
6.40 6.80
5.20 5.50
6.80 7.20
2.40 3.00
2.30 REF.
0.70 0.90
0.60 0.90
REF.
G
H
J
K
L
M
R
Millimeter
Min. Max.
0.50 0.70
2.20 2.40
0.45 0.55
0 0.15
0.90 1.50
5.40 5.80
0.80 1.20
3.3V /0.8A
2.5V/0.8A
GJ1118
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Block Diagram
ISSUED DATE :2006/06/07
REVISED DATE :
Pin Descriptions
Name I/O Pin#
Adj (GND)
1
Vout
O2
Vin I 3
Function
A resistor divider from this pin to the Vout pin and ground sets the output voltage
(Ground only for fixed mode)
The output of the regulator. A minimum of 10uF capacitor (0.15 ESR 20 )
must be connected from this pin to ground to insure stability.
The input pin of regulator. Typically a large storage capacitor (0.15 ESR 20 )
is connected from this pin to ground to insure that the input voltage does not sag
below the minimum dropout voltage during the load transient response. This pin
must always be 1.3V higher than Vout in order for the device to regulate properly.
Absolute Maximum Ratings
Symbol
Parameter
VIN DC Supply Voltage
PD Power Dissipation
TST Storage Temperature
TOP
Operating Junction Temperature Range
Ratings
-0.3 to 12
Internally Limited
-65 ~ + 150
0 ~ + 150
Unit
V
GJ1118
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