参数资料
| 型号： | ISL9444IRZ |
| 厂商： | Intersil |
| 文件页数： | 10/24页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 40-QFN |
| 标准包装： | 60 |
| PWM 型： | 电流模式 |
| 输出数： | 3 |
| 频率 - 最大： | 1.32MHz |
| 电源电压： | 4.5 V ~ 28 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： | 40-VFQFN 裸露焊盘 |
| 包装： | 管件 |
ISL9444
Electrical Specifications Recommended operating conditions unless otherwise noted. Refer to Block Diagram on page 5 and Typical
Application Schematics on pages 6 and 7. V IN = 5.0V to 28V, or VCC_5V = 5V ±10%, C_VCC_5V = 4.7μF, T A = -40°C to +85°C, 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
SOFT-START CURRENT
I SS
EN/SS1, TK/SSx Soft-Start Charge Current
VEN/SS1 = VTK/SSx = 0V
1.05
1.55
2.05
μA
DEFAULT INTERNAL MINIMUM SOFT-STARTING
t SS_MIN
Default Internal Output Ramping Time
1.3
2.1
2.9
ms
POWER-FAIL MONITOR
V PFI_REF
V PFI_FAL
PFI Input Threshold Voltage, Rising
PFI Input Threshold Voltage, Falling
1.16
1.05
1.22
1.12
1.28
1.19
V
V
V PFO_L
V PFO_H
PFO Output Voltage Low
PFO Output Voltage High
I_SINK = 1mA
I_SOURCE = 1mA
VCC_5V -0.3
0.3
V
V
POWER-GOOD MONITORS
V PGOV
V PGUV
V PGLOW
I PGLKG
PGOODx Upper Threshold, PWM 1, 2 and 3
PGOODx Lower Threshold, PWM 1, 2 and 3
PGOODx Low Level Voltage
PGOODx Leakage Current
PGOOD Rise Time
PGOOD Fall Time
I_SINK = 2mA
PGOODx = 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
PGOOD1, PGOOD2 TIMING
t PGR
t PGF
VOUT Rising Threshold to PGOOD Rising
VOUT Falling Threshold to PGOOD Falling
EN2, EN3 Falling Threshold to PGOOD Falling
0.7
40
1.1
75
1.2
1.5
110
1.7
ms
μs
μs
PGOOD3 TIMING
PG3_DLY Charge Current
PG3_DLY Threshold Voltage (Note 9)
V PG3_DLY = 1.2V
1.2
1.16
1.9
1.195
2.6
1.23
μA
V
REFERENCE SECTION
V REF
Internal Reference Voltage
0.700
V
Reference Voltage Accuracy
T A = 0°C to +85°C
T A = -40°C to +85°C
-1.0
-1.15
+1.0
+1.0
%
%
V FBx
I FBLKG
FB Voltage Accuracy
FB Bias Current (Note 9)
T A = -40°C to +85°C
-1.5
+1.5
100
%
nA
PWM CONTROLLER ERROR AMPLIFIERS
DC Gain (Note 9)
88
dB
GBW
SR
Gain-BW Product (Note 9)
Slew Rate (Note 9)
15
2.0
MHz
V/μs
PWM REGULATOR
t OFF_MIN
D V RAMP
Minimum Off Time
Peak-to-Peak Saw-tooth Amplitude (Note 9)
R T = 169k Ω
V IN = 12V
95
125
1.2
155
ns
V
Ramp Offset
10
V IN = 5.0V
0.55
1
V
V
FN7665.3
May 29, 2012
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