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| 型号： | A4402KLPTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 4/17页 |
| 文件大小： | 0K |
| 描述： | IC REG DL BUCK/LINEAR 16-TSSOP |
| 标准包装： | 1 |
| 拓扑： | 降压（降压）（1），线性（LDO）（1） |
| 功能： | 车载 |
| 输出数： | 2 |
| 频率 - 开关： | 2MHz |
| 电压/电流 - 输出 1： | 3.3 V ~ 5 V，1A |
| 电压/电流 - 输出 2： | 1.8 V ~ 3.3 V，250mA |
| 带 LED 驱动器： | 无 |
| 带监控器： | 无 |
| 带序列发生器： | 无 |
| 电源电压： | 6 V ~ 50 V |
| 工作温度： | -40°C ~ 150°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 供应商设备封装： | 16-TSSOP-EP |
| 包装： | 标准包装 |
| 其它名称： | 620-1462-6 |
A4402
Constant On-Time Buck Converter
With Integrated Linear Regulator
ELECTRICAL CHARACTERISTICS 1 valid for Temperature Range E version at T J = 25°C and for Temperature Range K
version at T J = –40°C to 150°C, V IN1 = 6 to 50 V (unless otherwise noted)
Characteristics
Supply Quiescent Current
ENB Logic Input Voltage
ENB Hysteresis
ENB Logic Input Current 2
Symbol
I IN(Q)
V ENB
V ENBHYS
I ENB
Test Conditions
ENB = 5 V, I OUT = I SW +I LIN = 0 mA, 13.5 V < V IN1 < 50 V
ENB = 0 V, 13.5 V< V IN1 < 18 V, I OUT = I SW + I LIN = 0 mA
V ENB rising
High input level, V ENB = 3 V
Low input level, V ENB < 0.4 V
Min.
1
–
2.0
–
–
–2
Typ.
–
–
2.28
100
–
–
Max.
6
1
2.56
–
100
2
Unit
mA
μA
V
mV
μA
μA
Linear Regulator
Feedback Voltage
V O2 Undervoltage Lockout
Threshold
V O2 Undervoltage Lockout
Hysteresis
Feedback Input Bias Current 2
Current Limit
V FB2
V O2UVLO
V O2UVHYS
I FB2
I O2
1 mA < I O2 < 250 mA, 3.3 V < V IN2 < 5 V
V O2 rising based on FB voltage
1.156
0.896
30
–100
250
1.180
0.944
50
100
–
1.204
0.990
70
400
350
V
V
mV
nA
mA
Switching Regulator
Feedback Voltage
Feedback Input Bias Current
Switcher On Time
t on Low Voltage Threshold
t on High Voltage Threshold
Changeover Hysteresis
Minimum On-time
Minimum Off-time
Buck Switch On-Resistance
ISEN Voltage
Valley Current Limit Threshold
V FB1
I FB1
t on
V PL
V PH
V HYS
t onmin
t offmin
R DS(on)
V ISEN
I lim
I OUT = I SW + I LIN = 1 mA to 1.0 A, 8 V < V IN1 < 18 V
V IN1 = 6 V
V IN1 = 19.25 V, R ton = 750 k?
V IN1 = 13.5 V, R ton = 750 k?
V IN1 = 8 V, R ton = 750 k?
V IN1 rising
V IN1 rising
T J = 25°C, I LOAD = 1 A
T J = 125°C, I LOAD = 1 A
R SENSE = 0.27 ?
6 V < V IN1 < 8 V
1.139
–400
450
165
1050
8.1
15.75
–
80
130
–
–
–150
–
–
1.180
–100
640
230
1480
9
17.5
250
–
–
400
650
–250
740
–
1.221
100
830
300
1925
9.9
19.25
–
–
–
–
–
–350
–
550
V
nA
ns
ns
ns
V
V
mV
ns
ns
m?
m?
mV
mA
mA
Protection Circuitry
NPOR Output Voltage
NPOR Leakage Current
NPOR Reset
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
V NPOR
I NPOR
V NPORRESET
T JTSD
T JTSDHYS
I NPOR = 1 mA
V NPOR = 5.5 V
20 kΩ pullup connected to VOUT2
T J rising
–
–
–
–
–
–
–
–
170
15
400
1.5
0.7
–
–
mV
μA
V
oC
oC
Continued on the next page…
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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