參數(shù)資料
型號: MAX1928EUB25
廠商: MAXIM INTEGRATED PRODUCTS INC
元件分類: 穩(wěn)壓器
英文描述: Low-Output-Voltage, 800mA, PWM Step-Down DC-DC Converters
中文描述: 0.8 A SWITCHING REGULATOR, 1200 kHz SWITCHING FREQ-MAX, PDSO10
封裝: MICRO MAX PACKAGE-10
文件頁數(shù): 3/12頁
文件大小: 303K
代理商: MAX1928EUB25
M
Low-Output-Voltage, 800mA, PWM Step-Down
DC-DC Converters
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(V
BATT
= 3.6V,
SHDN
= BATT, C
REF
= 0.1μF,
T
A
= 0
°
C to +85
°
C
, unless otherwise noted. Typical values are at T
A
= +25
°
C.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
N-Channel Synchronous Rectifier Turn-Off
Threshold
20
mA
LX Leakage Current
Maximum Duty Cycle
V
BATT
= 5.5V, LX = GND or BATT
-20
100
0.1
+20
μA
%
PWM = GND
PWM = BATT
0
Minimum Duty Cycle
15
1
160
%
Internal Oscillator Frequency
Thermal Shutdown Threshold
POK COMPARATOR
BATT Operating Voltage Range
Output Low Voltage
Output High Leakage Current
0.85
1.15
MHz
D eg ees
15
°
C hysteresis
I
POK
= 0.1 mA
V
FB
= 0.5V, I
POK
= 1mA
V
POK
= 5.5V
MAX1927R
MAX1928-15
MAX1928-18
MAX1928-25
1
5.5
0.1
1
0.700
1.395
1.674
2.325
V
V
μA
0.01
0.650
1.305
1.566
2.175
0.675
1.350
1.620
2.250
POK Threshold
V
Output Valid to POK Release Delay
POK transitions to high impedance 20ms
after V
FB
> V
POK
15
20
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
0.1
ELECTRICAL CHARACTERISTICS
(V
BATT
= 3.6V,
SHDN
= BATT, C
REF
= 0.1μF,
T
A
= -40
°
C to +85
°
C
, unless otherwise noted.)
PARAMETER
CONDITIONS
MIN
2.6
2.15
MAX
5.5
2.55
240
340
10
UNITS
V
V
μA
μA
μA
BATT Input Voltage
Undervoltage Lockout Threshold
Quiescent Current
Quiescent Current in Dropout
Shutdown Supply Current
REFERENCE AND ERROR AMP
V
BATT
rising or falling (35mV hysteresis)
No load, pulse skipping, PWM = GND
SHDN
= GND
MAX1927R
MAX1928-15
MAX1928-18
MAX1928-25
MAX1928
0.732
1.47
1.764
2.45
5
0.768
1.53
1.836
2.55
15
FB Voltage Accuracy
V
FB Input Current
μA
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