参数资料
型号: ISL8121IRZ
厂商: Intersil
文件页数: 5/26页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM VM 24-QFN
标准包装: 75
PWM 型: 电压模式
输出数: 1
频率 - 最大: 2MHz
占空比: 66%
电源电压: 4.9 V ~ 5.5 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 85°C
封装/外壳: 24-VFQFN 裸露焊盘
包装: 管件
ISL8121
Absolute Maximum Ratings
Supply Voltage, VCC, PVCC . . . . . . . . . . . . . -0.3V to +6.5V
Shunt Regulator Voltage, V VREG . . . . . . . . . . -0.3V to +6.5V
Boot Voltage, V BOOT . . . . . . . . . PGND - 0.3V to PGND + 27V
Phase Voltage, V PHASE . . . . . . .V BOOT - 7V to V BOOT + 0.3V
Upper Gate Voltage, V UG . . . .V PHASE - 0.3V to V BOOT + 0.3V
Lower Gate Voltage, V LG . . . . . . PGND - 0.3V to VCC + 0.3V
Input, Output, or I/O Voltage. . . . GND - 0.3V to VCC + 0.3V
Thermal Information
Thermal Resistance θ JA (°C/W) θ JC (°C/W)
QFN Package (Notes 4, 5) . . . . . . . 43 7
Maximum Junction Temperature (Note 6). . . . . . . . . +150°C
Maximum Storage Temperature Range . . . -65°C to +150°C
Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . .see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
Recommended Operating Conditions
Supply Voltage, VCC . . . . . . . . . . . . . . . . . . +4.9V to +5.5V
Ambient Temperature . . . . . . . . . . . . . . . . . -40°C to +85°C
Junction Temperature Range . . . . . . . . . . . -40°C to +125°C
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. 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.
5. For θ JC , the “case temp” location is the center of the exposed metal pad on the package underside.
6. Operation with die temperatures between +125°C and +150°C can be tolerated for short periods of time, however, in order
to maximize the operating life of the IC, it is strongly recommended that the effective continuous operating junction
temperature of the die should not exceed +125°C.
Electrical Specifications
Operating Conditions: V CC = 5V, T J = -40°C to +85°C, unless otherwise specified. Boldface
limits apply over the operating temperature range, -40°C to +85°C.
MIN
MAX
PARAMETER
BIAS SUPPLY AND INTERNAL OSCILLATOR
TEST CONDITIONS
(Note 9) TYP (Note 9) UNITS
Input Bias Supply Current
Rising VCC POR (Power-On Reset) Threshold
VCC POR Hysteresis
Rising PVCC POR Threshold
I VCC ; EN > 0.7V; LG, UG open
4.30
0.46
3.60
7.6
4.40
0.51
3.67
9
4.50
0.58
3.75
mA
V
V
V
Shunt Regulation
Maximum Shunt Current
Switching Frequency (per Channel; Note 8)
Frequency Tolerance
Oscillator Peak-to-Peak Ramp Amplitude
Maximum Duty Cycle
V VCC ; I VREG = 0mA to 120mA
I VREG_MAX
F SW
F SW
V OSC
d MAX
4.90
120
150
-10
5.10
1.4
66
5.35
2000
10
V
mA
kHz
%
V
%
CONTROL THRESHOLDS
EN Threshold
EN Hysteresis Current
0.65
20
V
μA
VMON Power-Good Enable Threshold
V VMON_TH
290
305
320
mV
VMON Hysteresis Current
SOFT-START
10
μA
SS Current
SS Ramp Amplitude
SS Threshold for Output Gates Turn-Off
I SS
0.55
0.40
22
3.60
μA
V
V
REFERENCE AND DAC
System Accuracy (Industrial Temp. Range)
Internal Reference
V REF
-0.8
0.6
0.8
%
V
External Reference DC Amplitude Range
V REFTRK (DC)
0.1
2.3
V
5
FN6352.2
October 27, 2009
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