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| 型号： | ISL78228ARZ-T |
| 厂商： | Intersil |
| 文件页数： | 4/18页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ DL 10-DFN |
| 标准包装： | 6,000 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 2 |
| 输出电压： | 0.6 V ~ 5.5 V |
| 输入电压： | 2.75 V ~ 5.5 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 2.25MHz |
| 电流 - 输出： | 800mA |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | * |
| 封装/外壳： | * |
| 包装： | * |
| 供应商设备封装： | * |
ISL78228
Absolute Maximum Ratings (Reference to GND)
Supply Voltage (V IN ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6.5V
V IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 7V (20ms)
EN1, EN2, PG, SYNC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-0.3V to V IN + 0.3V
LX1, LX2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1.5V to 6.5V
LX1, LX2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1.5V (100ns)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V (DC) to 7V (20ms)
FB1, FB2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 2.7V
ESD Rating
Human Body Model (Tested per JESD22-A114E) . . . . . . . . . . . . . . . . 3kV
Machine Model (Tested per JESD-A115-A) . . . . . . . . . . . . . . . . . . . 300V
Charge Device Model (Tested per JESD22-C101C). . . . . . . . . . . . . . . 2kV
Latch Up (Tested per JESD78C; Class II, Level A) . . . . . . . . . . . . . . . 100mA
Thermal Information
Thermal Resistance (Typical) θ JA (°C/W) θ JC (°C/W)
10 Ld 3x3 DFN Package (Notes 4, 5) . . . . . . 49 4
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
V IN Supply Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.75V to 5.5V
Load Current Range Per Channel . . . . . . . . . . . . . . . . . . . . . 0mA to 800mA
Ambient Temperature Range . . . . . . . . . . . . . . . . . . . . . . .-40°C to +105°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.
Electrical Specifications Unless otherwise noted, all parameter limits are established over the recommended operating
conditions: T A = -40°C to +105°C, V IN = 2.75V to 5.5V, EN1 = EN2 = V IN , SYNC = 0V, L = 2.2μH, C 1 = 10μF, C 2 = C 4 = 10μF,
I OUT1 = I OUT2 = 0A to 800mA. (Typical values are at T A = +25°C, V IN = 3.6V). Boldface limits apply over the operating temperature range,
-40°C to +105°C.
MIN
MAX
PARAMETER
SYMBOL
TEST CONDITIONS
(Note 6)
TYP
(Note 6)
UNITS
INPUT SUPPLY
V IN Undervoltage Lockout Threshold
Quiescent Supply Current
V UVLO
I VIN
Rising
Falling
SYNC = V IN , EN1 = EN2 = V IN , no load at the
output and no switches switching.
2.1
2.5
2.4
30
2.75
50
V
V
μA
VFB1 = VFB2 = 0.7V
SYNC = GND, EN1 = EN2 = VIN,
0.1
1
mA
F S = 2.25MHz, no load at the output
Shut Down Supply Current
I SD
V IN = 5.5V, EN1 = EN2 = GND
6.5
12
μA
OUTPUT REGULATION
FB1, FB2 Regulation Voltage
FB1, FB2 Bias Current
Line Regulation
V FB_
I FB_
VFB = 0.55V
V IN = V O + 0.5V to 5.5V (minimal 2.75V,
I OUT = 0A)
0.590
0.6
0.1
0.2
0.610
V
μA
%/V
Soft-Start Ramp Time Cycle
OVERCURRENT PROTECTION
2
ms
Peak Overcurrent Limit
I pk1
I pk2
0.95
0.95
1.2
1.2
1.6
1.6
A
A
Peak SKIP Limit
I skip1
I skip2
V IN = 3.6V
180
180
250
250
360
360
mA
mA
LX1, LX2
P-Channel MOSFET ON-Resistance
N-Channel MOSFET ON-Resistance
V IN = 5.5V, I O = 200mA
V IN = 2.75V, I O = 200mA
V IN = 5.5V, I O = 200mA
V IN = 2.75V, I O = 200mA
180
320
180
320
350
450
350
450
m Ω
m Ω
m Ω
m Ω
4
FN7849.2
December 4, 2013
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