gm7109 Gamma Microelectronics, gm7109 Datasheet - Page 5

• Manufacturer Part Number: gm7109
• Description: 150khz, 2a Step Down Voltage Switching Regulators
• Manufacturer: Gamma Microelectronics

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating
Note 2: The human body model is a 100pF capacitor discharged through a 1.5KΩresistor into each pin.
Note 3: Typical numbers are at
Note 4: All limits guaranteed at room temperature (standard type face) and at temperature extremes (bold type
Note 5: External components such as the catch diode, inductor, input and output capacitors, and voltage
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.
Electrical Characteristics: All Output Voltage Versions
(Specifications with standard type face are for T
rage. Unless otherwise specified, V
Parameter
Feedback Bias
Current
Oscillator
Frequency
Saturation
Voltage
Max Duty Cycle
(ON)
Min Duty Cycle
(OFF)
Current Limit
Output Leakage
Current
Quiescent
Current
Standby
Quiescent
Current
SD Pin
lnput Level
SD Pin lnput
Current
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.
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).
programming resistors can affect switching regulator system performance. When the GM7109 is used as
shown in the Figure 1 test circuit, system performance will be as shown in system parameters section of
Electrical Characteristics.
Logic
Condition
V
(Note 6)
I
(Note 8)
(Note 9)
Peak Current (Notes 7, 8)
Output =0V (Notes 7, 9, 10)
Output = -0.9V (Note 10)
(Note 9)
SD Pin = 5V (OFF), Note 10
Low (ON)
High (OFF)
V
V
OUT
FB
LOGlC
LOGlC
=1.3V (Adjustable Version Only)
= 2A (Notes 7, 8)
= 2.5V (OFF)
= 0.5V (ON)
25°C
IN
= 12V)
and represent the most likely norm.
J
= 25℃, and those with bold face type apply over full Operating Temperature
Symbol
V
l
STBY
DC
DC
V
V
l
150KHz, 2A STEP DOWN VOLTAGE
I
f
SAT
l
I
I
CL
l
Q
b
o
L
H
L
IH
IL
Min
127
110
3.4
2.0
SWITCHING REGULATORS
-
-
-
-
-
-
-
Typ
1.16
0.02
150
100
1.3
1.3
10
70
0
2
5
5
-
GM7109
Max
100
173
173
100
200
1.4
1.5
0.6
50
15
5
-
-
-
-
Unit
kHz
mA
mA
nA
µA
µA
µA
µA
%
%
V
A
V
5