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參數(shù)資料
| 型號： | MAX1537ETX |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | High-Efficiency, 5x Output, Main Power-Supply Controllers for Notebook Computers |
| 中文描述： | SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, QCC36 |
| 封裝： | 6 X 6 MM, 0.8 MM HEIGHT, MO-220WJJD-1, TQFN-36 |
| 文件頁數(shù)： | 25/38頁 |
| 文件大?。?/td> | 763K |
| 代理商： | MAX1537ETX |
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M
High-Efficiency, 5x Output, Main Power-Supply
Controllers for Notebook Computers
______________________________________________________________________________________
25
Power-Good Output (PGOOD)
PGOOD is the open-drain output of a comparator that
continuously monitors both SMPS output voltages for
undervoltage conditions. PGOOD is actively held low in
shutdown (
SHDN
or ON3 or ON5 = GND), soft-start,
and soft-shutdown. Once the digital soft-start termi-
nates, PGOOD becomes high impedance as long as
both outputs are above 90% of the nominal regulation
voltage set by FB_. PGOOD goes low once either
SMPS output drops 10% below its nominal regulation
point, an output overvoltage fault occurs, or either
SMPS controller is shut down. For a logic-level PGOOD
output voltage, connect an external pullup resistor
between PGOOD and V
CC
. A 100k
pullup resistor
works well in most applications.
PGOOD is independent of the fault protection states
OVP
and
UVP
.
Fault Protection
Output Overvoltage Protection (OVP)
If the output voltage of either SMPS rises above 111%
of its nominal regulation voltage and the OVP protection
is enabled (
OVP
= GND), the controller sets the fault
latch, pulls PGOOD low, shuts down both SMPS con-
trollers, and immediately pulls DH_ low and forces DL_
MAX1533
MAX1537
LDO5
BST
DH
LX
(R
BST
)*
(C
NL
)*
D
BST
C
BST
C
BYP
INPUT (V
IN
)
N
H
L
LDO5
DL
GND
N
L
(R
BST
)* OPTIONAL—THE RESISTOR LOWERS EMI BY DECREASING
THE SWITCHING-NODE RISE TIME.
(C
NL
)* OPTIONAL—THE CAPACITOR REDUCES LX TO DL CAPACITIVE
COUPLING THAT CAN CAUSE SHOOT-THROUGH CURRENTS.
Figure 6. Optional Gate-Driver Circuitry
POR
ENABLE OVP
ENABLE UVP
BLANK
(POWER-UP)
POWER-
GOOD
FAULT
0.9 x
INT REF_
0.7 x
INT REF_
1.11 x
INT REF_
FAULT
LATCH
TIMER
POWER-GOOD
FAULT
PROTECTION
INTERNAL FB
Figure 7. Power-Good and Fault Protection
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1537ETX-T | 功能描述:電流和電力監(jiān)控器、調(diào)節(jié)器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel |
| MAX1537EVKIT | 制造商:Maxim Integrated Products 功能描述:MAIN POWER SUPPLY CONTROLLER FOR NOTEBOOK - Bulk |
| MAX1538ETI | 功能描述:電池管理 RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| MAX1538ETI+ | 功能描述:電池管理 Power-Source Select for Dual-Bat System RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| MAX1538ETI+T | 功能描述:電池管理 Power-Source Select for Dual-Bat System RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
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