参数资料
| 型号： | ISL9443IRZ-T7A |
| 厂商： | Intersil |
| 文件页数： | 10/23页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 32-QFN |
| 标准包装： | 1 |
| PWM 型： | 电流模式 |
| 输出数： | 3 |
| 频率 - 最大： | 1.32MHz |
| 电源电压： | 4.5 V ~ 26 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 32-VFQFN 裸露焊盘 |
| 包装： | 标准包装 |
| 其它名称： | ISL9443IRZ-T7ADKR |
ISL9443
Electrical Specifications
Recommended operating conditions unless otherwise noted. Refer to Block Diagram and Typical Application
Schematic. V IN = 5.0V to 28V, or VCC_5V = 5V ±10%, C_VCC_5V = 4.7μF, T A = -40°C to +85°C (Note 9), Typical values are at T A = +25°C, unless otherwise
specified. Boldface limits apply over the operating temperature range, -40°C to +85°C (Continued)
MIN
MAX
SYMBOL
PARAMETER
TEST CONDITIONS
(Note 9)
TYP
(Note 9)
UNITS
DEFAULT INTERNAL MINIMUM SOFT-STARTING FOR PWM2 AND PWM3
t SS_MIN
Default Internal Output Ramping Time
1.3
2.1
2.9
ms
POWER-GOOD MONITORS
V PGOV
V PGUV
V PGLOW
I PGLKG
PGOOD Upper Threshold, PWM 1, 2 and 3
PGOOD Lower Threshold, PWM 1, 2 and 3
PGOOD Low Level Voltage
PGOOD Leakage Current
PGOOD Rise Time
PGOOD Fall Time
I_SINK = 2mA
PGOOD = 5V
RPULLUP = 10k to 3.3V
RPULLUP = 10k to 3.3V
105.5
85
111
89
1
0.05
0.05
115.5
94
0.3
150
%
%
V
nA
μs
μs
PGOOD TIMING
t PGR
t PGF
VOUT Rising Threshold to PGOOD Rising
VOUT Falling Threshold to PGOOD Falling
0.7
40
1.1
75
1.5
110
ms
μs
REFERENCE SECTION
V REF
Internal Reference Voltage
Across specified temperature range
0.7
V
I FBLKG
Reference Voltage Accuracy
FB Bias Current (Note 10)
T A = 0°C to +85°C
T A = -40°C to +85°C
-1.0
-1.15
+1.0
+1.0
100
%
%
nA
PWM CONTROLLER ERROR AMPLIFIERS
DC Gain (Note 10)
88
dB
GBW
SR
Gain-BW Product (Note 10)
Slew Rate (Note 10)
15
2.0
MHz
V/μs
PWM REGULATOR
t OFF_MIN
Δ V RAMP
Minimum Off Time
Peak-to-Peak Saw-tooth Amplitude (Note 9)
RFS = 169k ?
V IN = 12V
95
125
1.2
155
ns
V
Ramp Offset
SWITCHING FREQUENCY (Note 10)
V IN = 5.0V
0.55
1
V
V
F SW
V RT
Switching Frequency
Switching Frequency
Switching Frequency
RT Voltage
R T = 20.5k ?
R T = 169k ?
R T = 49.9k ?
R T = 49.9k ?
1080
168
540
485
1200
198
600
500
1320
228
660
515
kHz
kHz
kHz
mV
SYNCHRONIZATION
F SYNC
SYNC Synchronization Range
R T = 49.9k ?
1020
1380
kHz
LIGHT LOAD EFFICIENCY MODE
V MODETHH
V MODETHL
V CROSS
MODE/SYNC Threshold High
MODE/SYNC Threshold Low
Diode Emulation Phase Threshold (Note 11)
V IN = 12V
1.3
1.1
1.6
1.4
-3
1.9
1.7
V
V
mV
10
FN7663.1
February 24, 2012
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