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參數(shù)資料
| 型號： | ISL8011 |
| 廠商： | Intersil Corporation |
| 英文描述： | 1.2A Integrated FETs, High Efficiency Synchronous Buck Regulator(1.2A集成FETs, 高效同步降壓調(diào)節(jié)器) |
| 中文描述： | 1.2A的集成FET，高效率同步降壓穩(wěn)壓器（1.2A的集成FET的高效同步降壓調(diào)節(jié)器） |
| 文件頁數(shù)： | 2/10頁 |
| 文件大小： | 296K |
| 代理商： | ISL8011 |
2
FN9254.1
November 6, 2007
Absolute Maximum Ratings
(Reference to SGND)
Thermal Information
Supply Voltage (PVIN, V
CC
) . . . . . . . . . . . . . . . . . . . . -0.3V to 6.5V
EN, MODE, PHASE, POR. . . . . . . . . . . . . . . . . .-0.3V to V
CC
+0.3V
FB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 2.7V
PGND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 0.3V
Recommended Operating Conditions
PVIN Supply Voltage Range . . . . . . . . . . . . . . . . . . . . . 2.7V to 5.5V
Load Current Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0A to 1.2A
Ambient Temperature Range. . . . . . . . . . . . . . . . . . .-40°C to +85°C
Thermal Resistance (Notes 1, 2)
10 Ld 3x3 DFN Package . . . . . . . . . . .
Junction Temperature Range. . . . . . . . . . . . . . . . . .-55°C to +125°C
Storage Temperature Range . . . . . . . . . . . . . . . . . .-65°C to +150°C
Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below
θJA
(°C/W)
+46
θ
JC
(
°C
/W)
+4
AUTION: 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:
1.
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.
2.
θ
JC
, “case temperature” location is at the center of the exposed metal pad on the package underside. See Tech Brief TB379.
Electrical Specifications
Unless otherwise noted, all parameter limits are guaranteed over the recommended operating conditions and
the typical specification are measured at the following conditions: T
A
= +25°C, V
PVIN
= V
VCC
= 3.6V,
EN = V
CC
, L = 1.8μH, C
1
= 10μF, C
2
= 10μF, I
OUT
= 0A (see “Typical Applications” on page 6).
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNITS
SUPPLY
V
CC
Undervoltage Lockout Threshold
V
UVLO
Rising
-
2.5
2.7
V
Falling
2.2
2.4
-
V
Quiescent Supply Current
I
PVIN
No load at the output
-
5
8
mA
Shut Down Supply Current
I
SD
V
CC
= PVIN = 5.5V, EN = low
-
0.1
2
μA
OUTPUT REGULATION
FB Regulation Voltage
V
FB
T
A
= 0°C to +85°C
0.784
0.8
0.816
V
T
A
= -40°C to +85°C
0.78
0.8
0.82
V
FB Bias Current
I
FB
FB = 0.75V
-
0.1
-
μA
Output Voltage Accuracy
PVIN = V
O
+ 0.5V to 5.5V, I
O
= 0A to 1.2A,
T
A
= -40°C to +85°C
-3
-
3
%
Line Regulation
PVIN = V
O
+ 0.5V to 5.5V (minimal 2.7V)
-
0.2
-
%/V
Maximum Output Current
1.2
-
-
A
COMPENSATION
Error Amplifier Trans-conductance
Adjustable version, design info only
-
20
-
μA/V
PHASE
P-Channel MOSFET On-Resistance
PVIN = 3.6V, I
O
= 200mA
-
0.12
0.22
Ω
PVIN = 2.7V, I
O
= 200mA
-
0.16
0.27
Ω
N-Channel MOSFET On-Resistance
PVIN = 3.6V, I
O
= 200mA
-
0.11
0.22
Ω
PVIN = 2.7V, I
O
= 200mA
-
0.15
0.27
Ω
P-Channel MOSFET Peak Current Limit
I
PK
1.5
2.1
2.6
A
PHASE Maximum Duty Cycle
-
100
-
%
PWM Switching Frequency
f
S
T
A
= -40°C to +85°C
1.35
1.6
1.75
MHz
PHASE Minimum On Time
-
-
140
ns
Soft Start-Up Time
-
1.1
-
ms
ISL8011
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