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GMOS Technology
GMOS Technology

GT1504 Datasheet Preview

GT1504 Datasheet

2A PWM Buck Switching Regulator

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GT1504 pdf
GT1504
150Khz, 2A PWM Buck Switching Regulator
General Description
Features
The GT1504 is a monolithic integrated circuit that
provide all the active functions for a step-down
switching regulator, capable of driving a 2A load
without additional transistor component. Requiring
a minimum number of external component, the
board space can be saved easily. The external
shutdown function can be controlled by TTL logic
level and then come into standby mode. The
internal compensation makes feedback control
have good line and load regulation without external
design. Regarding protected function, thermal
shutdown is to prevent over temperature operating
from damage, and current limit is against over
current operating of the output switch. The GT1504
operates at a switching frequency of 150Khz thus
allowing smaller sized filter components than what
would be needed with lower frequency switching
regulators. Other features include a guaranteed
+4% tolerance on output voltage under specified
input voltage and output load conditions, and +15%
on the oscillator frequency. The output version
included fixed 3.3V, 5V, 12V, and an adjustable
type. The packages are available in a standard
8-lead SOP8.
- 3.3V, 5V, 12V and adjustable output versions
- Adjustable version output voltage range, 1.23V to
37V +4% max over line and load condiction
- SOP-8L packages
- Voltage mode non-synchronous PWM control
- Thermal-shutdown and current-limit protection
- ON/OFF shutdown control input
- Input voltage range up to 40V
- Output load current: 2A
- 150 kHz fixed frequency internal oscillator
- Low power standby mode
- Built-in switching transistor on chip
Applications
- Simple High-efficiency step-down(buck) regulator
- Efficient preregulator for linear regulators
- On-card switching regulators
- Positive to negative converter
- Battery Charger
Pin Assignments 脚位排列
(Top View)
VIN 1
Out 2
FB 3
SD 4
8 GND
7 GND
6 GND
5 GND
SOP-8L
Pin Descriptions 脚位描述
Name
VIN
Out
Gnd
FB
SD
Description
Operating voltage input.输入脚
Switching output.输出脚
Ground.接地脚
Output voltage feedback control.反馈脚
ON/OFF Shutdown.使能脚
150Khz, 2A PWM Buck Switching Regulator
Ordering Information
GT1504 XX X X
Output version
Package
-ADJ : Adjustable
-33 : 3.3V
-50 : 5.0V
-12 : 12V
BLANK: SOP-8L
Packing
Blank : Tube
A : Taping
GT1504
Block Diagram
SD
Current
Source
bias
1.235V
Reference
2.5V
Regulator
Start
up
200mV
220 mV
+
Comp_
VIN
Comp
+
FB
+
Amp
_
Comp
+
Pre-driver
2A
Switch
150kHz
OSC.
Thermal
Limit
Output
Gnd
GMOS Technology Crop.
www.gmos-semi.com
1/9
GMOS Technology Corp.
www.gmos-semi.com
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GMOS Technology
GMOS Technology

GT1504 Datasheet Preview

GT1504 Datasheet

2A PWM Buck Switching Regulator

No Preview Available !

GT1504 pdf
150Khz, 2A PWM Buck Switching Regulator
GT1504
Absolute Maximum Ratings
Symbol 符号
Parameter参数
VCC 输入电压 Supply Voltage
VSD 使能电压 ON/OFF Pin input voltage
VFB 反馈电压 Feedback Pin voltage
VOUT 输出电压 Output voltage to Ground
PD 耗散功率 Power dissipation
TST 储存温度 Storage temperature
TOP 运行温度 Operating temperature
VOP 运行电压 Operating voltage
Rating范围
+45
-0.3 to +25
-0.3 to +25
-1
Internally limited
-65 to +150
-40 to +125
+4.5 to +25
Unit单位
V
V
V
V
W
oC
oC
V
Electrical Characteristics (All Output Voltage Versions)
Unless otherwise specified, V IN=12V for 3.3V, 5V, adjustable version and V IN=24V for the 12V version. I LOAD = 0. 2A
Symbol
Parameter
Conditions
Min. Typ. Max.
IB Feedback bias current
反馈偏流
VFB=1.3V 仅仅适用于可调版
(Adjustable version only)
-50
-10
-100
FOSC oscillator frequency
震荡频率
127
110
Fscp 短路保 Oscillator frequency of When current limit occurred
护时的震荡频率 short circuit protect
and VFB <0.55V 限流出现时
IOUT =1.5A
VSAT saturation voltage 饱和电压 no outside circuit 无外部电路
饱和电压
VFB=0V force driver on 强制驱动开
Max. Duty Cycle(ON)
DC
死区 Min. Duty cycle(OFF)
VFB=0V force driver on 强制驱动开
VFB=12V force driver off强制驱动关
peak current 峰值电流
ICL current limit极限电流
极限电流
no outside circuit 无外围电路
2.4
VFB=0 force driver on 强制驱动
IL
Output = 0V
Output 输出 no outside circuit 无外围电路
Leakage泄漏 VFB=12 force driver off 强制驱动关
Output = -1V Current 电流 VIN=24V
150
30
1.25
100
0
2.8
-5
173
173
70
1.4
1.5
3.3
3.6
-200
IQ Quiescent Current 静态电流 VFB=12 force driver off 强制驱动关
5 10
ISTBY
Standby Quiescent
Current 待机静态电流
ON/OFF pin=5V
VIN=24V
150
70
200
VIL Low (regulator ON)
ON/OFF pin logic input
VIH threshold voltage
使能阀值输入电压
High (regulator OFF)
IH
ON/OFF pin logic
input current 使能输入电流
VLOGIC =2.5V (OFF)
- 0.6
1.3
2.0
-
-0.01
IL ON/OFF pin input current VLOGIC =0.5V (ON)
Ts
Over temperature 温控阀值 Tj increasing
shutdown threshold
Tj decreasing
-0.1 -1
175
150
Unit
nA
Khz
Khz
V
%
A
uA
mA
mA
uA
V
uA
GMOS Technology Corp.
www.gmos-semi.com
3/9
150Khz, 2A PWM Buck Switching Regulator
GT1504
Electrical Characteristics (Continued)
GT1504-ADJ
GT1504-3.3V
GT1504-5V
GT1504-12V
Symbol
VFB
反馈电压
η效率
Parameter
Output
Feedback
Effi ci ency
Conditions
Typ.
5V < VIN < 40V
0.2A < ILOAD < 2A
VOUT programmed for
3V
1.235
VIN = 12V, ILOAD=2A 75
Limit
1.193/1.18
1.267/1.28
VOUT
Output voltage
输出电压
5.5V < VIN < 40V
0.2A < ILOAD < 2A
3.3
3.168/3.135
3.432/3.465
η效率
Efficiency VIN = 12V, ILOAD=2A 75
VOUT
输出电压
η效率
Output voltage
8V < VIN < 40V
0.2A < ILOAD < 2A
Efficiency VIN = 12V, ILOAD=2A
5
80
4.8/4.75
5.2/5.25
VOUT
输出电压
η效率
Output voltage
15V < VIN < 40V
0.2A < ILOAD < 2A
Efficiency VIN = 15V, ILOAD = 2A
12
90
11.52/11.4
12.48/12.6
Specifications with boldface type are for full operating temperature range, the other type are for T =J25_C.
Unit
V
VMI N
VMAX
%
V
VMI N
VMAX
%
V
VMI N
VMAX
%
V
VMI N
VMAX
%
GMOS Technology Corp.
www.gmos-semi.com
4/9


Part Number GT1504
Description 2A PWM Buck Switching Regulator
Maker GMOS Technology
Total Page 5 Pages
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