參數(shù)資料
型號： MAX1977EEI
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 穩(wěn)壓器
英文描述： High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers
中文描述： DUAL SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO28
封裝： 0.150 INCH, 0.025 INCH PITCH, QSOP-28
文件頁數(shù)： 3/32頁
文件大?。?/td> 497K
代理商： MAX1977EEI
M
High-Effic ienc y, Quad Output, Main Power-
S upply Controllers for Notebook Computers
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1 and Figure 2, no load on LDO5, LDO3, OUT3, OUT5, and REF, V+ = 12V, ON3 = ON5 = V
CC
, V
SHDN
= 5V,
T
A
= 0°C to +85°C
, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
CONDITIONS
MIN
TYP
200
300
400
500
36
2.105
0.925
1.052
0.555
300
94
91
88
85
MAX
UNITS
5V SMPS
3.3V SMPS
5V SMPS
3.3V SMPS
MAX1777 or MAX1999
(V
TON
= 5V),
SKIP
= V
CC
MAX1977 or MAX1999
(V
TON
= 0),
SKIP
= V
CC
SKIP = REF
Operating Frequency
25
kHz
V
OUT5
= 5.05V
V
OUT3
= 3.33V
V
OUT5
= 5.05V
V
OUT3
= 3.33V
1.895
0.833
0.895
0.475
250
2.315
1.017
1.209
0.635
350
MAX1777 or MAX1999
(V
TON
= 5V)
On-Time Pulse Width
MAX1977 or MAX1999
(V
TON
= 0)
μs
Minimum Off-Time
ns
V
OUT5
= 5.05V
V
OUT3
= 3.33V
V
OUT5
= 5.05V
V
OUT3
= 3.33V
MAX1777 or MAX1999
(V
TON
= 5V)
Maximum Duty Cycle
MAX1977 or MAX1999
(V
TON
= 0)
%
INTERNAL REGULATOR AND REFERENCE
LDO5 Output Voltage
LDO5 Short-Circuit Current
ON3 = ON5 = GND, 6V < V+ < 24V, 0 < I
LDO5
< 100mA
LDO5 = GND
4.90
5.00
190
5.10
V
mA
LDO5 Undervoltage Lockout
Fault Threshold
Falling edge of LDO5, hysteresis = 1%
3.7
4.0
4.3
V
LDO5 Bootstrap Switch Threshold
Falling edge of OUT5, rising edge at OUT5 regulation
point
4.43
4.56
4.69
V
LDO5 Bootstrap
Switch Resistance
LDO5 to OUT5, V
OUT5
= 5V
1.4
3.2
LDO3 Output Voltage
LDO3 Short-Circuit Current
ON3 = ON5 = GND, 6V < V+ < 24V, 0 < I
LDO3
< 100mA
LDO3 = GND
3.28
3.35
180
3.42
V
mA
LDO3 Bootstrap Switch Threshold
Falling edge of OUT3, rising edge at OUT3 regulation
point
2.80
2.91
3.02
V
LDO3 Bootstrap Switch
Resistance
LDO3 to OUT3, V
OUT3
= 3.2V
1.5
3.5
REF Output Voltage
REF Load Regulation
REF Sink Current
V+ Operating Supply Current
V+ Standby Supply Current
V+ Shutdown Supply Current
No external load
0 < I
LOAD
< 50μA
REF in regulation
LDO5 switched over to OUT5, 5V SMPS
V+ = 6V to 24V, both SMPSs off, includes I
SHDN
V+ = 4.5V to 24V
Both SMPSs on, FB3 = FB5 =
SKIP
= GND, V
OUT3
=
3.5V, V
OUT5
= 5.3V
1.980
2.000
2.020
10
V
mV
μA
μA
μA
μA
10
25
150
6
50
250
15
Quiescent Power Consumption
3
4.5
mW
FAULT DETECTION
Overvoltage Trip Threshold
FB3 or FB5 with respect to nominal regulation point
+8
+11
+14
%
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1977EEI+ 功能描述:DC/DC 開關(guān)控制器 Quad Out Main Power Supply Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
MAX1977EEI+T 功能描述:DC/DC 開關(guān)控制器 Quad Out Main Power Supply Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
MAX1977EEI-T 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
MAX1977EEI-TG068 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:
MAX1978ETM 功能描述:電壓模式 PWM 控制器 RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel
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