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参数资料
| 型号： | MAX1843 |
| 厂商： | Maxim Integrated Products, Inc. |
| 英文描述： | 2.7A, 1MHz, Low-Voltage, Step-Down Regulator with Internal Synchronous Rectification in QFN Package |
| 中文描述： | 2.7A、1MHz、低电压、降压型稳压器，内置同步整流，TQFN封装 |
| 文件页数： | 2/13页 |
| 文件大小： | 366K |
| 代理商： | MAX1843 |
M
2.7A, 1MHz, Low-Voltage, Step-Down Regulator with
Internal Synchronous Rectification in QFN Package
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
V
CC
, IN to GND ........................................................-0.3V to +6V
IN to V
CC
.............................................................................±0.3V
GND to PGND.....................................................................±0.3V
All Other Pins to GND.................................-0.3V to (V
CC
+ 0.3V)
LX Current (Note 1).............................................................±4.7A
REF Short Circuit to GND Duration ............................Continuous
ESD Protection.....................................................................±2kV
Note 1:
LX has internal clamp diodes to PGND and IN. Applications that forward bias these diodes should take care not to exceed the
IC
’
s package power dissipation limits.
ELECTRICAL CHARACTERISTICS
(V
IN
= V
CC
= +3.3V, FBSEL = GND,
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.
Continuous Power Dissipation (T
A
= +70°C)
28-Pin QFN (derate 20mW/°C above +70°C, part mounted
on 1in
2
of 1oz copper)......................................................1.6W
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
Junction Temperature......................................................+150°C
Lead Temperature (soldering, 10s)................................ +300°C
PARAMETER
SYMBOL
V
IN
, V
CC
CONDITIONS
MIN
3.0
TYP
MAX
5.5
UNITS
V
Input Voltage
T
A
= +25
°
C
to +85
°
C
2.500
2.525
2.550
FBSEL = V
CC
T
A
= 0
°
C to
+85
°
C
2.487
2.525
2.563
T
A
= +25
°
C
to +85
°
C
1.500
1.515
1.530
FBSEL =
unconnected
T
A
= 0
°
C to
+85
°
C
1.492
1.515
1.538
T
A
= +25
°
C
to +85
°
C
1.800
1.818
1.836
FBSEL = REF
T
A
= 0
°
C to
+85
°
C
1.791
1.818
1.845
T
A
= +25
°
C
to +85
°
C
1.089
1.100
1.111
Preset Output Voltage
V
OUT
V
IN
=
+3V to
+5.5V
I
LOAD
=
0 to 2.5A
V
FB
=
V
OUT
FBSEL = GND
T
A
= 0
°
C to
+85
°
C
1.084
1.100
1.117
V
Adjustable Output Voltage
Range
V
IN
= V
CC
= +3V to +5.5V, FBSEL = GND
V
REF
V
IN
V
AC Load Regulation Error
DC Load Regulation Error
Dropout Voltage
2
%
%
mV
0.4
V
DO
V
IN
= V
CC
= +3V, I
LOAD
= 1A
T
A
= +25
°
C to +85
°
C
T
A
= 0
°
C to +85
°
C
I
REF
= -1μA to +10μA
250
1.111
1.117
2
200
250
150
200
4.1
3.1
1.089
1.084
1.100
1.100
0.5
90
110
70
80
3.6
Reference Voltage
V
REF
V
Reference Load Regulation
V
REF
mV
V
IN
= +4.5V
V
IN
= +3V
V
IN
= +4.5V
V
IN
= +3V
PMOS Switch On-Resistance
R
ON,P
I
LX
= 0.5A
m
NMOS Switch On-Resistance
R
ON,N
I
LX
= 0.5A
m
Current-Limit Threshold
RMS LX Output Current
I
LIMIT
3.1
A
A
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| MAX1843EGI-T | 功能描述:直流/直流开关调节器 RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX1843ETI+ | 功能描述:直流/直流开关调节器 2.7A 1MHz Step-Down RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
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