Description
GM66102 of positive fixed and adjustable regulators is de-
signed to provide up to 1A output with high current, high ac-
curacy, and extremely low dropout voltage performance.
These regulators feature 300 to 350mV (full load) dropout
voltages and very low ground current. Although designed
for high current, and loads, these devices are also useful in
lower current, extremely low dropout-critical systems,
where their minimal dropout voltage and ground current val-
ues are important characteristics.
GM66102 is fully protected against overcurrent, reversed
input polarity (or reversed battery connection), reversed
lead insertion, over-temperature operation, and transient
voltage spikes (positive or negative). GM66102 is available
in TO-220, SOT-223, TO-252 and TO-263 packages.
Features
Fixed and Adjustable Voltage Versions
Output Current up to 1A
Low Dropout Voltage 350mV @ 1A
Low Ground Current
Accurate 1% Guaranteed Tolerance
Extremely Fast Transient Response
Reverse-battery Protection
"Load Dump" Protection
Extremely Fast Transient Response
Application
High Efficiency Linear Regulators
Post Regulators for Switching Supplies
Battery Powered Equipment
Automotive Electronics
TYPICAL APPLICATION CIRCUITS
3.3V
± 5%
V
IN
GM66102 - 2.5
GND
V
OUT
2.5V
± 1% @1A
C
IN
+
22µF
+
33µF
C
IN
is required if regulator is located an appreciable distance from power supply filter.
www.gammamicro.com
GM66102
V0.1
1
GM 431
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Power Dissipation
Input Supply Voltage (Note 1.)
Lead Temperature (Soldering, 5 sec )
Storage Temperature Range
SYMBOL
P
D
V
IN
T
LEAD
T
STG
Value
Internally limited
-20 to +60
260
-65 to +150
UNIT
W
V
°C
°C
OPERATING RATINGS
PARAMETER
Maximum Operating Input Voltage
Operating Junction Temperature Range
Thermal Resistance (Junction to case)
TO- 223
TO- 252
TO- 263
TO- 220
SYMBOL
V
IN
T
J
Value
26
-40 to +125
UNIT
V
°C
R
qJC
15
6.0
2.0
2.0
°C/W
BLOCK DIAGRAM
V
IN
O.V.
I
Limit
28V
Ref.
1.24V
V
OUT
+
-
R1
GM66102
Thermal
Shut-down
R2
GND
4
ELECTRICAL CHARACTERISTICS
(T
A
= 25°C unless otherwise noted)
Unless otherwise specified: T
J
= 25°C;
Bold
values are guaranteed across the operating temperature range.
Parameter
Output Voltage
(Note2)
Line Regulation
Load Regulation
Output Voltage change with
Temperature Coef. (Note 6)
Dropout Voltage
Conditions
I
O
= 10 mA
10mA
I
O
I
FL
, (V
OUT
+ 1V) V
IN
26V
Min
-1
-2
Typ
Max
1
2
Unit
%
%
%
%
I
O
= 10mA, (V
OUT
+ 1V) V
IN
26V
V
IN
= V
OUT
+ 5V, 10mA I
OUT
I
FL
DV
OUT
/
DT
DV
OUT
=
-1% (Note 3)
I
O
= 100mA
I
O
= 750mA
I
O
= 1.0A
(For 1.50 Version)
0.06
0.20
20
0.5
1.0
100
ppm/°C
80
220
300
200
500
0.6
0.8
mV
I
O
= 100mA
I
O
= 1.0A
I
O
= 100mA
I
O
= 1.0A
V
(For 1.80 Version)
0.3
0.5
V
Ground Current
Ground Pin Current at Dropout I
GNDDO
Current Limit
Output Noise Voltage e
n
, (10Hz to 100Hz)
I
O
= 100mA
I
O
= 750mA, V
IN
= V
OUT
+ 1V
I
O
= 1.0A
V
IN
= 0.5V less than specified V
OUT
,
I
OUT
= 10mA, (Note 5)
V
OUT
,= 0V (Note 4)
C
L
= 10µF
C
L
= 33µF
8
22
0.9
2.1
400
260
20
mA
mA
3.5
A
µV (rms)
Note 1:
Maximum positive supply voltage of 60V must be of limited duration (<100msec) and duty cycle ( 1%).
The maximum continuous supply voltage is 26V.
Note 2:
Full Load current (I
FL
) is defined as 1.0A for the GM66102 series.
Note 3:
Dropout voltage is defined as the input-to-output differential when the output voltage drops to 99% of its nominal value with
V
OUT
+ 1V applied to V
IN
Note 4:
V
IN
= V
OUT
(nominal) + 1V. For example, use V
IN
= 4.3V for a 3.3V regulator or use 6V for a 5V regulator. Employ pulse-testing
procedures to minimize temperature rise.
Note 5:
Ground pin current is the regulator quiescent current. The total current drawn from the source is the sum of the load current plus
the ground pin current.
Note 6:
Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range.
GM66102
5
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