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参数资料
型号： MAX1572ETC250
厂商： MAXIM INTEGRATED PRODUCTS INC
元件分类： 稳压器
英文描述： 800mA, 2MHz, PWM DC-to-DC Step-Down Converter with RESET
中文描述： 2.1 A SWITCHING REGULATOR, 2200 kHz SWITCHING FREQ-MAX, QCC12
封装： 4 X 4 MM, 0.80 MM HEIGHT, MO-220WGGB, TQFN-12
文件页数： 2/11页
文件大小： 340K
代理商： MAX1572ETC250
M
800mA, 2MHz, PWM DC-to-DC
Step-Down Converter with
RESET
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ABATT, BATT, EN1, EN2,
RESET
, OUT,
SS to GND............................................................-0.3V to +6V
PGND to GND .......................................................-0.3V to +0.3V
LX Current (Note 1).............................................................
±
2.1A
Output Short-Circuit Duration ............................................Infinite
Continuous Power Dissipation (T
A
= +70
°
C)
12-Pin Thin QFN (derate 16.9mW/
°
C above +70
°
C)...1349mW
Note 1:
LX has internal clamp diodes to PGND and BATT. Applications that forward bias these diodes should take care not to
exceed the IC
’
s package power dissipation limits.
ELECTRICAL CHARACTERISTICS
(V
BATT
= 3.6V,
T
A
= +0°C to +85°C
, unless otherwise noted. Typical values are at T
A
= +25°C.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Operating Temperature Range ...........................-40
°
C to +85
°
C
Junction Temperature......................................................+150
°
C
Storage Temperature Range.............................-65
°
C to +150
°
C
Lead Temperature (soldering, 10s).................................+300
°
C
PARAMETER
CONDITIONS
MIN
2.6
2.20
TYP
MAX
5.5
2.55
80
UNITS
V
V
BATT Input Voltage
Undervoltage Lockout Threshold
V
BATT
rising and falling, 1% hysteresis
EN1 = GND, EN2 = BATT, no switching
EN1 = BATT, EN2 = GND, no switching
EN1 = EN2 = GND, T
A
= +25
°
C
2.35
48
700
0.1
Quiescent Supply Current
μA
Shutdown Supply Current
Maximum Output Current
OUT Bias Current
1
μA
mA
μA
800
6
9
No load, EN1 = EN2 = BATT
100mA load
300mA load
550mA load
800mA load
1.2
+0.8
0
-1
-2
0.3
0.28
0.33
0.18
0.20
1.25
-0.52
40
3.2
+2.0
-0.4
Output-Voltage Accuracy
(Voltage Positioning)
%
Line Regulation
%/V
V
BATT
= 3.6V
V
BATT
= 2.6V
V
BATT
= 3.6V
V
BATT
= 2.6V
0.45
P-Channel On-Resistance
I
LX
= 180mA
0.30
N-Channel On-Resistance
I
LX
= 180mA
P-Channel Current-Limit Threshold
N-Channel Current-Limit Threshold
N-Channel Zero-Crossing Threshold
LX Output Current
LX Leakage Current
Maximum Duty Cycle
1.00
-0.68
15
1.65
-0.37
65
1.4
10
A
A
EN1 = EN2 = BATT
EN1 = BATT, EN2 = GND
(Note 2)
EN1 = EN2 = GND
mA
A
RMS
μA
%
0.1
100
EN1 = BATT, EN2 = GND or
EN1 = GND, EN2 = BATT
0
Minimum Duty Cycle
EN1 = EN2 = BATT
16.7
2
100
17.3
2.2
150
%
Switching Frequency
SS Output Impedance
1.8
65
MHz
k
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