Description
The GM66150 series of positive fixed and adjustable regu-
lators is designed to provide up to 1.5A output with high
current, high accuracy, 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 loads, these devices
are also useful in lower current, extremely low dropout-
critical systems, where their minimal dropout voltage and
ground current values are important characteristics.
The GM66150 is fully protected against overcurrent, re-
versed input polarity (or reversed battery connection), re-
versed lead insertion, over-temperature operation, and tran-
sient voltage spikes (positive or negative).
Five pin fixed voltage versions feature logic level ON/OFF
control and an error flag which signals whenever the output
falls out of regulation.
On the GM66151 and GM66152, the ENABLE pin may be
tied to V
IN
if it is not required for ON/OFF control.
The GM66150 is available in 3-pin and 5-pin TO-220 and
surface mount TO-263 packages.
Features
Fixed and Adjustable Voltage Versions
Output Current up to 1.5A
Low Dropout Voltage 350mV @ 1.5A
Low Ground Current
Accurate 1% Guaranteed Tolerance
Extremely Fast Transient Response
Reverse-battery Protection
"Load Dump" Protection
Zero-Current shutdown mode(5-pin versions)
Error flag signals output out-of-regulation
(5-pin versions)
Application
High Efficiency Linear Regulators
Post Regulators for Switching Supplies
High Efficiency "Green" Computer
Systems
Battery Powered Equipment
Automotive Electronics
5 V ± 5%
GM66150 - 3.3
+
3.3 V ± 1% @1.5A
V
OUT
= 1.24V X [1 + (R1 /R2)]
47µF
V
IN
R1
10µF
+
+
V
OUT
22µF
R2
Figure 1. Fixed Voltage Version
Figure 2. Adjustable Voltage Version
www.gammamicro.com
GM66150 SERIES
V0.1
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TYPICAL APPLICATION CIRCUITS
GM 431
GAMMA [ GAMMA MICROELECTRONICS INC. ]
