参数资料
| 型号： | NCV890231MWTXG |
| 厂商： | ON Semiconductor |
| 文件页数： | 6/15页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 2A 10-DFN |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 可调至 0.8V |
| 输入电压： | 4.5 V ~ 36 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 2MHz |
| 电流 - 输出： | 2A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-VFDFN 裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 10-DFN（3x3） |
| 其它名称： | NCV890231MWTXGOSDKR |
NCV890231
ELECTRICAL CHARACTERISTICS (V IN = 4.5 V to 28 V, V EN = 5 V, V BST = V SW + 3.0 V, C DRV = 0.1 m F, Min/Max values are valid
for the temperature range ? 40 ° C ≤ T J ≤ 150 ° C unless noted otherwise, and are guaranteed by test, design or statistical correlation.)
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
SYNCHRONIZATION
SYNCI Low Pulse Width
t LSYNCI
V SYNC < min V LSYNC
40
ns
External Sync Frequency
Master Reassertion Time
F SYNCI
t I(SYNC)
Time from last rising SYNCI edge
to first un ? synchronized turn ? on.
1.8
650
2.5
MHz
ns
VIN OVERVOLTAGE SHUTDOWN MONITOR
Overvoltage Stop Threshold
Overvoltage Start Threshold
V OVSTP
V OVSTT
32.4
30
36
35.4
V
V
Overvoltage Hysteresis
V OVHY
0.6
1.5
2.4
V
SLOPE COMPENSATION
Ramp Slope (Note 1)
(With respect to switch current)
S ramp
S ramp(HV)
4.5 < V IN < 18 V
20 V < V IN < 28 V
0.7
0.25
1.3
0.6
A/ m s
POWER SWITCH
ON Resistance
Leakage current VIN to SW
R DSON
I LKSW
V BST = V SW + 3.0 V
V EN = 0 V, V SW = 0, V IN = 18 V
650
10
m W
m A
Minimum ON Time
t ONMIN
Measured at SW pin
45
70
ns
Minimum OFF Time
t OFFMIN
Measured at SW pin
At F SW = 2 MHz (normal)
At F SW = 500 kHz (max duty cycle)
30
30
50
70
ns
PEAK CURRENT LIMIT
Current Limit Threshold
I LIM
2.2
2.45
2.7
A
SHORT CIRCUIT FREQUENCY FOLDBACK
Lowest Foldback Frequency
Lowest Foldback Frequency ? High V in
Hiccup Mode
F SWAF
F SWAFHV
F SWHIC
V FB = 0 V, 4.5 V < V IN < 18 V
V FB = 0 V, 20 V < V IN < 28 V
V FB = 0 V
400
200
24
500
250
32
600
300
40
kHz
GATE VOLTAGE SUPPLY (DRV pin)
Output Voltage
DRV POR Start Threshold
DRV POR Stop Threshold
V DRV
V DRVSTT
V DRVSTP
3.1
2.7
2.5
3.3
2.9
2.8
3.5
3.05
3.0
V
V
V
DRV Current Limit
I DRVLIM
V DRV = 0 V
16
45
mA
OUTPUT PRECHARGE DETECTOR
Threshold Voltage
V SSEN
20
35
50
mV
THERMAL SHUTDOWN
Activation Temperature (Note 1)
Hysteresis (Note 1)
T SD
T HYS
150
5
190
20
° C
° C
1. Not tested in production. Limits are guaranteed by design.
http://onsemi.com
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