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| 型号： | ISL8112IRZ-T |
| 厂商： | Intersil |
| 文件页数： | 5/27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
LDO 5V Bootstrap Switch Threshold to BYP
CONDITIONS
Rising edge at BYP regulation point
(Note 3)
4.53
TYP
4.68
(Note 3)
4.83
UNITS
V
LDOREF = GND
LDO 3.3V Bootstrap Switch Threshold to BYP Rising edge at BYP regulation point
3.0
3.1
3.2
V
LDOREF = VCC
LDO 5V Bootstrap Switch Equivalent
LDO to BYP, BYP = 5V, LDOREF > (VCC-1V) (Note 4)
0.7
1.5
Ω
Resistance
LDO 3.3V Bootstrap Switch Equivalent
LDO to BYP, BYP = 3.3V, LDOREF < 0.3V (Note 4)
1.5
3.0
Ω
Resistance
VREF2 Output Voltage
VREF2 Load Regulation
VREF2 Current Limit
VREF1 Output Voltage
No external load, VCC > 4.5V
No external load, VCC < 4.0V
0 < ILOAD < 5mA
VREF2 = GND
No external load
3.235
3.220
1.980
3.300
3.300
10
10
2.000
3.365
3.380
17
2.020
V
V
mV
mA
V
VREF1 Load Regulation
VREF1 Sink Current
0 < ILOAD < 50μA
VREF1 in regulation
10
10
mV
μA
V IN Operating Supply Current
Both SMPSs on, FB1 = MODE = GND,
OUT2REF = VCC
25
50
μA
VSEN1 = BYP = 5.3V, VSEN2 = 3.5V
V IN Standby Supply Current
V IN Shutdown Supply Current
Quiescent Power Consumption
V IN = 5.5V to 25V, both SMPSs off, EN_LDO = VCC
V IN = 4.5V to 25V, EN1=EN2=EN_LDO=0V
Both SMPSs on, FB1 = MODE = GND,
180
20
5
250
30
7
μA
μA
mW
OUT2REF = VCC,
VSEN1 = BYP = 5.3V, VSEN2 = 3.5V
FAULT DETECTION
Overvoltage Trip Threshold
Overvoltage Fault Propagation Delay
PGOOD_ Threshold
FB1 with respect to nominal regulation point
OUT2REF with respect to nominal regulation point
FB1 or OUT2REF delay with 50mV overdrive
FB1 or OUT2REF with respect to nominal output, falling
+8
+12
-12
+11
+16
10
-9
+14
+20
-6
%
%
μs
%
edge, typical hysteresis = 1%
PGOOD_ Propagation Delay
PGOOD_ Output Low Voltage
PGOOD_ Leakage Current
Thermal-Shutdown Threshold
Falling edge, 50mV overdrive
ISINK = 4mA
High state, forced to 5.5V
10
+150
0.2
1
μs
V
μA
°C
Output Undervoltage Shutdown Threshold
Output Undervoltage Shutdown Blanking
FB1 or OUT2REF with respect to nominal output voltage
From EN_ signal
65
10
70
20
75
30
%
ms
Time
INPUTS AND OUTPUTS
FB1 Input Voltage
Low level
High level
VCC-1.0
0.3
V
V
OUT2REF Input Voltage
VSEN2 Dynamic Range, VSEN2= V OUT2REF
Fixed VSEN2 = 1.05V
0.5
3.0
2.50
VCC-
V
V
1.1
5
Fixed VSEN2 = 3.3V
VCC-1.0
V
FN6396.1
August 10, 2010
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