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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： | 4/13页 |
| 文件大小： | 366K |
| 代理商： | MAX1843 |
Typical Operating Characteristics
(Circuit of Figure 1, T
A
= +25
°
C, unless otherwise noted.)
0.001
0.01
0.1
1
10
EFFICIENCY vs. OUTPUT CURRENT
(V
IN
= +5.0V, L = 2.5
μ
H)
M
OUTPUT CURRENT (A)
V
OUT
= +1.5V, R
TOFF
= 1OOk
,
f
PWM
= 770kHz
V
OUT
= +1.8V, R
TOFF
= 75k
,
f
PWM
= 910kHz
V
OUT
= +2.5V, R
TOFF
= 47k
,
f
PWM
= 1070kHz
100
95
90
85
80
70
65
60
55
50
75
E
0.001
0.01
0.1
1
10
EFFICIENCY vs. OUTPUT CURRENT
(V
IN
= +3.3V, L = 1.5
μ
H)
M
OUTPUT CURRENT (A)
V
OUT
= +2.5V, R
TOFF
= 56k
,
f
PWM
= 1000kHz
V
OUT
= +2.5V, R
TOFF
= 39k
,
f
PWM
= 610kHz
V
OUT
= +1.8V, R
TOFF
= 43k
,
f
PWM
= 1050kHz
100
95
90
85
80
70
65
60
55
50
75
E
0.001
0.01
0.1
1
10
EFFICIENCY vs. OUTPUT CURRENT
(f
PWM
= 270kHz)
M
I
OUT
(A)
V
IN
= +3.3V, V
OUT
= +1.8V,
L = 4.7
μ
H, R
TOFF
= 160k
100
95
90
85
80
70
65
60
55
50
75
E
V
IN
= +5V, V
OUT
= +1.8V, L = 5.6
μ
H,
R
TOFF
= 240k
NORMALIZED OUTPUT ERROR
vs. OUTPUT CURRENT
M
0.001
0.01
0.1
1
10
OUTPUT CURRENT (A)
V
IN
= +3.3V, V
OUT
= +1.5V, L = 1.5
μ
H
V
IN
= +5V, V
OUT
= +1.5V, L = 2.5
μ
H
0.1
0
-0.1
-0.2
-0.3
-0.4
N
PARAMETER
SYMBOL
CONDITIONS
V
IN
= +4.5V
V
IN
= +3V
MIN
MAX
150
200
4.3
1.0
600
300
1.15
UNITS
NMOS Switch On-Resistance
R
ON,N
I
LX
= 0.5A
m
Current-Limit Threshold
Idle-Mode Current Threshold
No-Load Supply Current
FB Input Bias Current
Off-Time
I
LIMIT
2.9
0.2
A
A
μA
nA
μs
I
IN
+ I
CC
I
FB
t
OFF
V
FB
= 1.2V
V
FB
= 1.2V
R
TOFF
= 110k
0
0.85
M
2.7A, 1MHz, Low-Voltage, Step-Down Regulator with
Internal Synchronous Rectification in QFN Package
4
_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= V
CC
= +3.3V, FBSEL = GND,
T
A
= -40
°
C to +85
°
C
, unless otherwise noted. Typical values are at T
A
= +25
°
C.) (Note 3)
Note 2:
Recommended operating frequency, not production tested.
Note 3:
Specifications from 0
°
C to -40
°
C are guaranteed by design, not production tested.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1843EGI | 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 |
| MAX1843EGI+ | 制造商:Maxim Integrated Products 功能描述:2.7A, 1MHZ, INTERNAL SWITCH STEP DOWN REGULATOR - Rail/Tube |
| MAX1843EGI+T | 制造商:Maxim Integrated Products 功能描述:CONV DC-DC SGL-OUT STEP DOWN 28QFN EP - Tape and Reel |
| 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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