Global Mixed-mode Technology Inc.
Absolute Maximum Ratings
SW to GND…………………………………..-0.3V to +33V
FBN to GND…………… …………………… -V
CC
to +0.3V
VCC,
SHDN
to
GND.............................….....-0.3V to +7V
Operating Temperature Range (Note 1) ..-40°C to +85°C
G5122
Junction Temperature ......….......….........….........+125°C
Storage Temperature…………........….. –65°C to +150°C
Reflow Temperature (Soldering, 10 sec).….………260°C
Stress beyond those listed under “Absolute Maximum Rating” may cause permanent damage to the device.
Electrical Characteristics
(V
CC
= 3.6V,
V
SHDN
= 3.6V, T
A
=
25°C)
PARAMETER
Input Voltage Range
Quiescent Current
FBN Comparator Trip Point
Output Voltage Line Regulation
FBN Pin Bias Current (Note 2)
Switch Off Time
Switch R
DS(ON)
Switch Current Limit
SHDN
Pin Current
CONDITIONS
Not Switching
V
SHDN
= 0V
2.5V<V
IN
<6.5V
V
FBN
= -1.2V
V
FBN
< -1V
I
SW
= 150mA
MIN
2.5
---
---
-1.18
---
---
---
---
300
---
0.9
---
TYP
---
20
0.1
-1.2
-0.05
-1.6
500
0.8
350
0.1
---
---
0.01
1.9
MAX
6.5
35
1
-1.22
---
-2.4
---
1
400
1
---
0.25
5
---
UNITS
V
µA
µA
V
%/V
µA
ns
Ω
mA
µA
V
V
µA
V
SHDN
Input Voltage High
SHDN
Input Voltage Low
Switch Leakage Current
Input Voltage UVLO
Switch Off, V
SW
= 33V
---
---
Note 1: The G5122 are guaranteed to meet performance specifications from 0°C to 85°C. Specifications over the
-40°C to 85°C operating temperature range are assured by design, characterization and correlation with sta-
tistical process controls.
Note 2: Bias current flows into the FBN pin.
Block Diagram
L1
V
IN
C1
VCC
SHDN
SW
D1
C2
C3
L2
D2
V
OUT
BIAS
VOUT
SHUTDOWN
LOGIC
UVLO
R1
ERROR
COMP
FB
en_sw
+
PUMP CONTROL
OC
DRIVER
COMP
+
R2
T
OFF
PULSE
CONTROL
-1.2V
VREF
GND
Ver: 0.2 Preliminary
Mar 21, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
2
GMT [ GLOBAL MIXED-MODE TECHNOLOGY INC ]
