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參數(shù)資料
| 型號(hào)： | ISL6455 |
| 廠商： | Intersil Corporation |
| 英文描述： | Triple Output Regulator with Single Synchronous Buck and Dual LDO(帶單同步降壓和雙LDO的三路輸出調(diào)節(jié)器) |
| 中文描述： | 三單和雙同步降壓穩(wěn)壓器LDO輸出（帶單同步降壓和雙穩(wěn)壓器的三路輸出調(diào)節(jié)器） |
| 文件頁數(shù)： | 6/12頁 |
| 文件大小： | 320K |
| 代理商： | ISL6455 |
6
FN9196.0
December 21, 2005
ENABLE (EN and (EN_LDO)
EN High Level Input Voltage
As % of VIN
70
-
-
%
EN Low Level Input Voltage
As % of VIN
-
-
30
%
RESET BLOCK SPECIFICATIONS
RESET (reset released)
ISL6455, ISOURCE = 500
μ
A, VIN = 2.90V
0.8 x
V
CC
-
-
V
RESET (reset asserted)
ISL6455, ISINK = 1.2mA, VIN = 2.50V
-
-
0.3
V
RESET Rising Threshold
ISL6455
2.71
2.77
2.84
V
RESET Falling Threshold
ISL6455
2.69
2.75
2.81
V
RESET (reset released)
ISL6455A, ISOURCE = 800
μ
A, VIN = 4.70V
0.8 x
V
CC
-
-
V
RESET (reset asserted)
ISL6455A, ISINK = 3.2mA, VIN = 4.10V
-
-
0.4
V
RESET Rising Threshold
ISL6455A
4.19
4.27
4.35
V
RESET Falling Threshold
ISL6455A
4.16
4.24
4.32
V
RESET Threshold Hysteresis
ISL6455
-
20
-
mV
RESET Threshold Hysteresis
ISL6455A
-
30
-
mV
RESET Active Timeout Period (Note 5)
C
T
= 0.01
μ
F
-
25
-
ms
POWER GOOD (PG_LDO)
Minimum Input Voltage for Valid PG_LDO
-
1.2
-
V
PGOOD Threshold (Rising)
FB_LDO vs 1.184V Vref
+11
+15
+17
%
PGOOD Threshold (Falling)
-17
-15
-11
%
PGOOD Output Voltage Low
I
OL
= 1.2mA
-
-
0.4
V
PGOOD Output Leakage Current
PG_LDO = GND or VIN
-
0.01
0.1
μ
A
PWM OUTPUT OVERVOLTAGE
Overvoltage Threshold
FB_PWM vs 0.45V Vref
28
31
34
%
NOTES:
3. Specifications at -40°C and +85°C are guaranteed by 25°C test with margin limits.
4. This is the V
IN
current consumed when the device is active but not switching. Does not include gate drive current.
5. The dropout voltage is defined as V
IN
- V
OUT
, when V
OUT
is 50mV below the value of V
OUT
for V
IN
= V
OUT
+ 0.5V.
6. The RESET timeout period is linear with CT at the slope of 2.5ms/nF. Thus, at 10nF (0.01
μ
F) the RESET time is 25ms; at 1000nF (0.1
μ
F) the
RESET time would be 250ms.
7. Guaranteed by design, not production tested.
8. Add the external feedback resistor mismatch error to get initial V
OUT
accuracy.
Electrical Specifications
Recommended operating conditions unless otherwise noted. V
IN
= V
IN
_LDO = PV
CC
= 3.3V for ISL6455 and
5.0V for the ISL6455A, Compensation Capacitors = 33nF for LDO1 and LDO2. T
A
= -40°C to 85° (Note 2), typical
values are at T
A
= 25°C.
(Continued)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
ISL6455, ISL6455A
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