Power Management
A A
MICROELECTRONICS
GM7230
3A STEP-DOWN VOLTAGE REGULATOR
ELECTRICAL CHARACTERISTICS: All Output Voltage Versions
(Specifications with standard type face are for T = 25 C, and those with boldface type apply over full Operating Temperature Range.
J
Unless otherwise specified, V = 12V for the 3.3V, 5.0V andADJ version and V = 24V for 12V version. I
IN
= 500 mA)
IN
LOAD
Symbol
Typ
Parameter
Conditions
Min
Max
Unit
-
I
V
FB
= 1.3V (Adjustable Version Only)
Feedback Bias Current
Oscillator Frequency
Saturation Voltage
10
150
1.16
100
0
50 / 100
nA
kHz
V
b
f
o
(Note 6)
127/110
173 / 173
-
V
I
= 3A (Notes 7, 8)
1.4 / 1.5
SAT
OUT
-
Max Duty Cycle (ON)
Min Duty Cycle (OFF)
(Note 8)
DC
DC
%
%
-
(Note 9)
I
Peak Current (Notes 7, 8)
Current Limit
3.6 / 3.4
4.5
-
6.9 / 7.5
A
CL
-
-
(Notes 7, 9, 10)
(Notes 10)
Output = 0 V
µA
mA
mA
50
30
I
Output Leakage Current
L
Output = -0.9V
2
5
-
-
I
(Note 9)
Quiescent Current
10
Q
I
Standby Quiescent Current
µA
ON/OFF Pin = 5V (OFF) (Note 10)
80
200 / 250
STBY
-
-
-
-
-
q
TO-220 or TO-263 Package, Junction to Case
TO-220 Package, Junction to Ambient (Note 11)
TO-263 Package, Junction to Ambient (Note 12)
TO-263 Package, Junction to Ambient (Note 13)
TO-263 Package, Junction to Ambient (Note 14)
JC
-
-
-
-
-
2
50
50
30
20
q
JA
q
Thermal Resistance
°C/W
JA
q
JA
q
JA
-
V
Low (ON)
1.3
1.3
5
0.6
V
V
ON/OFF Pin
IH
-
V
Logic Input Level
High (OFF)
2.0
IL
-
I
H
V
= 2.5V (OFF)
µA
µA
15
LOGIC
ON/OFF Pin Input Current
-
I
L
V
= 0.5V (ON)
0.02
5
LOGIC
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical
Characteristics.
Note 2: The human body model is a 100 pF capacitor discharged through a 1.5k resistor into each pin.
Note 3: Typical numbers are at 25°C and represent the most likely norm.
Note 4: All limits guaranteed at room temperature (standard type face) and at temperature extremes (bold type face). All room temperature limits are
100% production tested. All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods.
All limits are used to calculate Average Outgoing Quality Level (AOQL).
Note 5: External components such as the catch diode, inductor, input and output capacitors, and voltage programming resistors can affect switching regulator
system performance. When the GM7230 is used as shown in the Figure 1 test circuit, system performance will be as shown in system parameters section
of Electrical Characteristics.
Note 6: The switching frequency is reduced when the second stage current limit is activated.
Note 7: No diode, inductor or capacitor connected to output pin.
Note 8: Feedback pin removed from output and connected to 0V to force the output transistor switch ON.
Note 9: Feedback pin removed from output and connected to 12V for the 3.3V, 5V, and the ADJ. version, and 15V for the 12V version, to force the output transistor
switch OFF.
Note 10: V = 40V.
IN
Note 11: Junction to ambient thermal resistance (no external heat sink) for the TO-220 package mounted vertically, with the leads soldered to a printed circuit board
2
with (1 oz.) copper area of approximately 1 in .
2
Note 12: Junction to ambient thermal resistance with the TO-263 package tab soldered to a single printed circuit board with 0.5 in of (1 oz.) copper area.
2
Note 13: Junction to ambient thermal resistance with the TO-263 package tab soldered to a single sided printed circuit board with 2.5 in of (1 oz.) copper area.
2
Note 14: Junction to ambient thermal resistance with the TO-263 package tab soldered to a double sided printed circuit board with 3 in of (1 oz.) copper area on
2
Gm7230 side of the board, and approximately 16 in of copper on the other side of the p-c board.
5
GAMMA [ GAMMA MICROELECTRONICS INC. ]
