参数资料
| 型号： | ISL78322ARZ |
| 厂商： | Intersil |
| 文件页数： | 5/18页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ DL 12-DFN |
| 标准包装： | 75 |
| 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： | 2.8 V ~ 5.5 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 2.25MHz |
| 电流 - 输出： | 2A，1.7A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 12-VFDFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 12-DFN（4x3） |
ISL78322
Absolute Maximum Ratings (Reference to GND)
Supply Voltage (V IN ) . . . . . . . . . . . . . . . . . . . . -0.3V to 6V (DC) or 7V (20ms)
EN1, EN2, PG, SYNC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-0.3V to V IN + 0.3V
LX1, LX2. . . . . . . . . . . . . . . . . . . . . . . -1.5V (100ns)/-0.3V (DC) to 6.5V (DC)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . or 7V (20ms)
FB1, FB2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 2.7V
ESD Rating
Human Body Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3kV
Machine Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250V
Charged Device Model (Tested per JESD22-C101E). . . . . . . . . . . . . . . 2k
Latch Up (Tested per JESD-78B; Class 2, Level A) . . . . . . . . . . . . . . 100mA
Thermal Information
Thermal Resistance (Typical) θ JA (°C/W) θ JC (°C/W)
4x3 DFN Package (Notes 4, 5) . . . . . . . . 41 3
Junction Temperature Range . . . . . . . . . . . . . . . . . . . . . . .-55°C to +150°C
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.8V to 5.5V
Load Current Range Channel 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0A to 2A
Load Current Range Channel 2 . . . . . . . . . . . . . . . . . . . . . . . . . . 0A to 1.7A
Ambient Temperature Range . . . . . . . . . . . . . . . . . . . . . . .-40°C to +105°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
5. θ JC , “case temperature” location is at 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 = 2.8V to 5.5V, EN1 = EN2 = V IN , SYNC = 0V, L = 1.2μH, C1 = 2 x 10μF, C2 = C4 = 22μF, I OUT1 = 0A to 2A,
I OUT2 = 0A to 1.7A. (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 Lock-out Threshold
Quiescent Supply Current
ShutDown Supply Current
V UVLO
I VIN
I SD
Rising
Falling
SYNC = V IN , EN1 = EN2 = V IN , no switches
switching
SYNC = GND, EN1 = EN2 = V IN , F S = 2.25MHz,
no load at the output
V IN = 5.5V, EN1 = EN2 = GND
2.0
2.5
2.4
40
0.86
6.5
2.8
55
1
12
V
V
μA
mA
μA
OUTPUT REGULATION
FB1, FB2 Regulation Voltage
FB1, FB2 Bias Current
Output Voltage Accuracy
V FB_
I FB_
VFB = 0.55V
SYNC = V IN , Io = 0A to 2A
0.590
0.6
0.1
±1.5
0.610
V
μA
%
SYNC = GND, Io = 0A to 2A
±1
%
Line Regulation
Soft-Start Ramp Time Cycle
V IN = V O + 0.5V to 5.5V (minimal 2.8V)
0.2
1.3
%/V
ms
OVERCURRENT PROTECTION
Dynamic Current limit ON-time
Dynamic Current Limit OFF-time
t OCON
t OCOFF
17
4
Clock
pulses
SS cycle
Peak Overcurrent Limit
Peak SKIP Limit
I pk1
I pk2
I skip1
I skip2
2.7
2.3
520
520
3.2
2.8
610
610
3.6
3.2
730
730
A
A
mA
mA
5
FN7908.1
January 14, 2014
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