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参数资料
| 型号： | ISL8112IRZ-T |
| 厂商： | Intersil |
| 文件页数： | 4/27页 |
| 文件大小： | 0K |
| 描述： | IC REG DL BCK/LINEAR SYNC 32-QFN |
| 标准包装： | 6,000 |
| 拓扑： | 降压（降压）同步（1），线性（LDO）（1） |
| 功能： | 任何功能 |
| 输出数： | 2 |
| 频率 - 开关： | 可调式 |
| 电压/电流 - 输出 1： | 控制器 |
| 电压/电流 - 输出 2： | 0.7 V ~ 4.5 V，200mA |
| 带 LED 驱动器： | 无 |
| 带监控器： | 无 |
| 带序列发生器： | 无 |
| 电源电压： | 4.5 V ~ 25 V |
| 工作温度： | -40°C ~ 100°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-VFQFN 裸露焊盘 |
| 供应商设备封装： | 32-QFN（5x5） |
| 包装： | 带卷 (TR) |
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ISL8112
Electrical Specifications
Circuit of Figure 17, and Figure 18, no load on LDO, VSEN1, VSEN2, VREF2, and VREF1, VIN = 12V,
EN2 = EN1 = VCC, VBYP = 5V, PVCC = 5V, VEN_LDO = 5V, T A = -40°C to +100°C, unless otherwise noted.
Typical values are at T A = +25°C. (Continued)
MIN
MAX
PARAMETER
CONDITIONS
(Note 3)
TYP
(Note 3)
UNITS
Current-Limit Threshold
(Positive, Adjustable)
GND - PH_
VILIM_ = 0.5V
VILIM_ = 1V
VILIM_ = 2V
40
93
185
50
100
200
60
107
215
mV
mV
mV
Zero-Current Threshold
Current-Limit Threshold (Negative, Default)
Soft-Start Ramp Time
MODE = GND, VREF1, or OPEN, GND - PH_
MODE = VCC, GND - PH_
Zero to full limit
3
-120
1.7
mV
mV
ms
Operating Frequency
(VFS = GND), MODE = VCC
(VFS = VREF1 or OPEN),
MODE = VCC
(VFS = VCC), MODE = VCC
SMPS 1
SMPS 2
SMPS 1
SMPS 2
SMPS 1
SMPS 2
400
500
400
300
200
300
kHz
kHz
kHz
kHz
kHz
kHz
On-Time Pulse Width
VFS = GND (400kHz/500kHz)
VFS = VREF1 or OPEN
(400kHz/300kHz)
VFS = VCC (200kHz/300kHz)
VSEN1 = 5.00V
VSEN2 = 3.33V
VSEN1 = 5.05V
VSEN2 = 3.33V
VSEN1 = 5.05V
0.895
0.475
0.895
0.833
1.895
1.052
0.555
1.052
0.925
2.105
1.209
0.635
1.209
1.017
2.315
μs
μs
μs
μs
μs
Minimum Off-Time
VSEN2 = 3.33V
0.833
200
0.925
300
1.017
400
μs
ns
Maximum Duty Cycle
Ultrasonic SKIP Operating Frequency
VFS = GND
VFS = VREF1 or OPEN
VFS = VCC
MODE = VREF1 or OPEN
VSEN1 = 5.05V
VSEN2 = 3.33V
VSEN1 = 5.05V
VSEN2 = 3.33V
VSEN1 = 5.05V
VSEN2 = 3.33V
25
88
85
88
91
94
91
37
%
%
%
%
%
%
kHz
INTERNAL REGULATOR AND REFERENCE
LDO Output Voltage
LDO Output Voltage
LDO Output in Adjustable Mode
LDO Output Accuracy in Adjustable Mode
BYP = GND, 5.5V < V IN < 25V, LDOREF < 0.3V,
0 < ILDO < 100mA
BYP = GND, 5.5V < V IN < 25V, LDOREF > (VCC-1V),
0 < ILDO < 100mA
V IN = 5.5V to 25V, V LDO = 2 x V LDOREF
V IN = 5.5V to 25V, V LDOREF = 0.35V to 0.5V
4.925
3.250
0.7
5.000
3.300
5.075
3.350
4.5
±2
V
V
V
%
V IN = 5.5V to 25V, V LDOREF = 0.5V to 2.25V
±1.5
%
LDOREF Input Range
LDO Output Current
LDO Output Current During Switch Over
LDO Output Current During Switch Over to
3.3V
LDO Short-Circuit Current
Undervoltage-Lockout Fault Threshold
V LDO = 2 x V LDOREF
BYP = GND, V IN = 5.5V to 25V (Note 4)
BYP = 5V, V IN = 5.5V to 25V, LDOREF < 0.3V
BYP = 3.3V, V IN = 5.5V to 25V, LDOREF > (VCC-1V)
LDO = GND, BYP = GND
Rising edge of PVCC
Falling edge of PVCC
0.35
3.9
200
4.35
4.05
2.25
100
200
100
400
4.5
V
mA
mA
mA
mA
V
4
FN6396.1
August 10, 2010
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