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参数资料
| 型号： | ISL6420AIRZ-TKR5264 |
| 厂商： | Intersil |
| 文件页数： | 7/21页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 20-QFN |
| 标准包装： | 1,000 |
| PWM 型： | 电压模式 |
| 输出数： | 1 |
| 频率 - 最大： | 1.4MHz |
| 占空比： | 100% |
| 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： | 20-VFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
ISL6420A
Absolute Maximum Ratings (Note 4)
Bias Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . +30V
BOOT and U GATE Pins . . . . . . . . . . . . . . . . . . . . . . . . . +36V
Thermal Information
Thermal Resistance (Typical) θ JA (°C/W) θ JC (°C/W)
QFN Package (Notes 5, 6) . . . . . . . 47 8.5
QSOP Package (Note 5) . . . . . . . . 90 NA
Maximum Junction Temperature (Plastic Package) . . +150°C
Maximum Storage Temperature Range . . . -65°C to +150°C
Ambient Temperature Range . -40°C to +85°C (for “I” suffix)
Junction Temperature Range . . . . . . . . . . -40°C to +125°C
Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . .see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
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.
NOTES:
4. All voltages are with respect to GND.
5. θ JA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach”
features. See Tech Brief TB379.
6. For θ JC , the “case temp” location is the center of the exposed metal pad on the package underside.
Electrical Specifications
Operating Conditions: VIN = 12V, PVCC shorted with VCC5, T A = +25°C. Boldface limits
apply over the operating temperature range, -40°C to +85°C.
MIN
MAX
PARAMETER
SYMBOL
TEST CONDITIONS
(Note 12)
TYP
(Note 12) UNITS
VIN SUPPLY
Input Voltage Range
5.6
12
28
V
VIN SUPPLY CURRENT
Shutdown Current (Note 7)
Operating Current (Notes 7, 8)
ENSS = GND
-
-
1.4
2.0
-
3.0
mA
mA
VCC5 SUPPLY (Notes 8, 9)
Input Voltage Range
Output Voltage
Maximum Output Current
VIN = VCC5 for 5V configuration
VIN = 5.6V to 28V, I L = 3mA to 50mA
VIN = 12V
4.5
4.5
50
5.0
5.0
-
5.5
5.5
-
V
V
mA
POWER-ON RESET
Rising VCC5 Threshold
VIN connected to VCC5, 5V input
4.310
4.400
4.475
V
operation
Falling VCC5 Threshold
UVLO Threshold Hysteresis
4.090
0.16
4.100
-
4.250
-
V
V
PWM CONVERTERS
Maximum Duty Cycle
Minimum Duty Cycle
FB Pin Bias Current
f SW = 300kHz
f SW = 300kHz
90
-
-
96
-
80
-
0
-
%
%
nA
Undervoltage Protection
Overvoltage Protection
V UV
V OVP
Fraction of the set point; ~3μs noise filter
Fraction of the set point; ~1μs noise filter
75
112
-
-
85
120
%
%
OSCILLATOR
Free Running Frequency
Total Variation
Frequency Range (Set by RT)
Ramp Amplitude (Note 10)
Δ V OSC
RT = VCC5, T A = -40°C to +85°C
T A = -40°C to +85°C, with frequency set
by external resistor at RT
VIN = 12V
270
-
100
-
300
±10%
-
1.25
330
-
1400
-
kHz
%
kHz
V P-P
7
FN9169.4
December 4, 2009
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