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参数资料
| 型号： | ISL6445IAZ-TK |
| 厂商： | Intersil |
| 文件页数： | 4/15页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 24-QSOP |
| 标准包装： | 1 |
| PWM 型： | 电流模式 |
| 输出数： | 2 |
| 频率 - 最大： | 1.55MHz |
| 占空比： | 73% |
| 电源电压： | 4.5 V ~ 24 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： | 24-SSOP（0.154"，3.90mm 宽） |
| 包装： | 标准包装 |
| 其它名称： | ISL6445IAZ-TKDKR |
ISL6445
Absolute Maximum Ratings
Thermal Information
Supply Voltage (VCC_5V Pin) . . . . . . . . . . . . . . . . . . . . -0.3V to +7V
Thermal Resistance (Typical)
θ JA (°C/W)
Input Voltage (VIN Pin) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+27V
BOOT1, 2 and UGATE1, 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . +35V
PHASE1, 2 and ISEN1, 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . +27V
BOOT1, 2 with Respect to PHASE1, 2 . . . . . . . . . . . . . . . . . . +6.5V
UGATE1, 2. . . . . . . . . . . . (PHASE1, 2 - 0.3V) to (BOOT1, 2 +0.3V)
24 Lead QSOP (Note 1). . . . . . . . . . . . . . . . . . . . . . 85
Maximum Junction Temperature (Plastic Package) -55°C to +150°C
Maximum Storage Temperature Range . . . . . . . . . .-65°C to +150°C
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +85°C
Pb-Free Reflow Profile. . . . . . . . . . . . . . . . . . . . . . . . .see link below
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and
result in failures not covered by warranty.
NOTE:
1. θ JA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
Electrical Specifications
Recommended operating conditions unless otherwise noted. Refer to “Block Diagram” on page 3 and “Typical
Application Schematic” on page 2. V IN = 5.6V to 24V, or VCC5 = 5V ±10%, T A = -40°C to +85°C, Typical values
are at T A = +25°C. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise
specified. Temperature limits established by characterization and are not production tested.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
VIN SUPPLY
Input Voltage Range
5.6
12
24
V
VCC_5V SUPPLY (Note 2)
Input Voltage
4.5
5.0
5.6
V
Output Voltage
Maximum Output Current
V IN > 5.6V, I L = 20mA
V IN = 12V
4.5
60
5.0
-
5.5
-
V
mA
SUPPLY CURRENT
Shutdown Current (Note 3)
Operating Current (Note 4)
SD1 = SD2 = GND
-
-
50
2.0
375
4.0
μA
mA
REFERENCE SECTION
Nominal Reference Voltage
Reference Voltage Tolerance
-
-1.0
0.8
-
-
1.0
V
%
POWER-ON RESET
Rising VCC_5V Threshold
Falling VCC_5V Threshold
4.25
3.95
4.45
4.2
4.5
4.4
V
V
OSCILLATOR
Total Frequency Variation
1.25
1.4
1.55
MHz
Peak-to-Peak Sawtooth Amplitude (Note 5)
V IN = 12V
-
1.6
-
V
Ramp Offset (Note 6)
V IN = 5V
-
-
0.667
1.0
-
-
V
V
SHUTDOWN1/SHUTDOWN2
HIGH Level (Converter Enabled)
LOW Level (Converter Disabled)
Internal Pull-up (3μA)
2.0
-
-
-
-
0.8
V
V
PWM CONVERTERS
Output Voltage
FB Pin Bias Current
-
-
0.8
-
-
150
V
nA
Maximum Duty Cycle
PWM1, C OUT = 1000p, T A = +25°C
PWM2, C OUT = 1000pF, T A = +25°C
71
73
-
-
-
-
%
%
4
FN9230.1
June 3, 2008
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