参数资料
| 型号： | LV5781-TLM-E |
| 厂商： | ON Semiconductor |
| 文件页数： | 2/7页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK 3.3V 3A 14HSSOP |
| 标准包装： | 2,000 |
| 类型： | 降压（降压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 3.3V |
| 输入电压： | 4.5 V ~ 6 V |
| 频率 - 开关： | 180kHz |
| 电流 - 输出： | 3A |
| 同步整流器： | 无 |
| 工作温度： | -30°C ~ 80°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-LSSOP（0.173"，4.40mm 宽）16 引线 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 14-HSSOP |
LV5781
Specifications
Absolute Maximum Ratings at Ta=25 ° C
Parameter
Maximum input voltage
Maximum CBOOT pin voltage
Maximum SW pin voltage
Maximum voltage between CBOOT and
SW pins
Maximum voltage at FB, SS, and
ENABLE pins
Junction temperature
Symbol
VIN max
VBT max
VSW max
VBS max
Vfs max
Tj max
Conditions
Ratings
6.5
13
6.5
6.5
6.5
125
Unit
V
V
V
V
V
° C
Allowable power dissipation
Operating temperature range
Storage temperature range
Pd max
Topr
Tstg
Mounted on a circuit board *1
0.85
-30 to +80
-40 to +125
W
° C
° C
*1: Mounted on a specified board: 114.3mm × 76.1mm × 1.6mm, glass epoxy.
*2: To ensure that the maximum voltage is not exceeded even for an instant, check that the coil voltage and other surge voltage levels are factored in.
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating
Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
Recommended Operating Conditions at Ta=25 ° C
Parameter
VIN pin voltage
CBOOT pin voltage
SW pin voltage
FB, SS, and ENABLE pin voltage
Symbol
VIN
VBT
VSW
VFSO
Conditions
Ratings
4.5 to 6
0 to 6
6
6
Unit
V
V
V
V
Electrical Characteristics at Ta=25 ° C, VIN=5V (Unless specifically specified)
Parameter
Symbol
Conditions
min
Ratings
typ
max
Unit
Output voltage 1
Output voltage 2
Standby mode IC consumption current
Operating time IC consumption current
VOUT1
VOUT2
ICC1
ICC2
FB2 pin selected
Dependent on the external voltage divider
ENABLE=0V
ENABLE=3V
3.2
0.85
3.3
1
2
3.4
10
5
V
V
μ A
mA
ENABLE high level voltage
ENABLE low level voltage
VENH
VENL
3
0.7
V
V
Efficiency
Effcy
IOUT=1A, VO=3.3V
90
%
Reference voltage
FB pin bias current
On resistance
Soft start current
Oscillation frequency
Vref
Iref
Ron
ISS
Fosc
VIN=4.5V to 6V( ± 2%)
CBOOT=5V
0.76
3
145
0.8
50
80
6.5
180
0.84
200
13
225
V
nA
m Ω
μ A
kHz
Maximum on duty ratio
Current limiting value
D max
Icl
85
4.1
%
A
Under voltage detection
Under voltage detection hysteresis
Thermal shutdown temperature
Thermal shutdown temperature
hysteresis
Vl
Vlh
Ttsd
Dtsd
Design guarantee value*
Design guarantee value*
3.3
0.15
3.7
0.185
180
20
4.2
0.25
V
V
° C
° C
*These are design guarantee values and no measurements are made.
No.A0663-2/7
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