參數(shù)資料
型號(hào)： MAX1843
廠商： 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、低電壓、降壓型穩(wěn)壓器，內(nèi)置同步整流，TQFN封裝
文件頁數(shù)： 4/13頁
文件大?。?/td> 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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參數(shù)描述
MAX1843EGI 功能描述:直流/直流開關(guān)調(diào)節(jié)器 RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體: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/直流開關(guān)調(diào)節(jié)器 RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
MAX1843ETI+ 功能描述:直流/直流開關(guān)調(diào)節(jié)器 2.7A 1MHz Step-Down RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
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