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參數(shù)資料
| 型號： | AX1928EUB25 |
| 英文描述： | SMPS Controller |
| 中文描述： | 開關電源控制器 |
| 文件頁數(shù)： | 4/12頁 |
| 文件大?。?/td> | 303K |
| 代理商： | AX1928EUB25 |
M
Low-Output-Voltage, 800mA, PWM Step-Down
DC-DC Converters
4
_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
BATT
= 3.6V,
SHDN
= BATT, C
REF
= 0.1μF,
T
A
= -40
°
C to +85
°
C
, unless otherwise noted. Typical values are at T
A
= +25
°
C.)
PARAMETER
CONDITIONS
MIN
MAX
150
1.269
2
UNITS
nA
V
mV
FB Input Current
Reference Voltage Accuracy
Reference-Supply Rejection
PWM CONTROLLER
MAX1927R
1.22
2.6V < V
BATT
< 5.5V
V
BATT
= 3.6V
V
BATT
= 2.6V
V
BATT
= 3.6V
V
BATT
= 2.6V
0.4
0.5
0.30
0.35
1.6
0.16
+20
P-Channel On-Resistance
N-Channel
On-Resistance
P-Channel Current-Limit Threshold
P-Channel Pulse-Skipping Current Threshold
LX Leakage Current
Maximum Duty Cycle
Minimum Duty Cycle
Internal Oscillator Frequency
POK COMPARATOR
BATT Operating Voltage Range
Output Low Voltage
Output High Leakage Current
1.1
0.10
-20
100
0.10
A
A
μA
%
%
MHz
V
BATT
= 5.5V, LX = GND or BATT
PWM = GND
0
0.8
1.2
I
POK
= 0.1 mA
V
FB
= 0.5V, I
POK
= 1mA
V
POK
= 5.5V
MAX1927R
MAX1928-15
MAX1928-18
MAX1928-25
POK transitions to high impedance 20ms
after V
FB
> V
POK
1
5.5
0.1
1
0.700
1.395
1.674
2.325
V
V
μA
0.650
1.305
1.566
2.175
POK Threshold
V
Output Valid to POK Release Delay
15
25
ms
LOGIC INPUTS (
SHDN
, PWM)
Logic Input High
Logic Input Low
Logic Input Current
2.6V < V
BATT
< 5.5 V
2.6V < V
BATT
< 5.5 V
V
BATT
= 5.5V
1.6
V
V
μA
0.6
1
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