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| 型号： | MAX1541ETL+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/49页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR DIVIDER PWM 40-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| PWM 型： | 电流模式 |
| 输出数： | 2 |
| 频率 - 最大： | 620kHz |
| 占空比： | 100% |
| 电源电压： | 2 V ~ 28 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 是 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 40-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
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ATION
EVALU
AVAILA
19-2861; Rev 3; 2/07
KIT
B LE
Dual Step-Down Controllers with Saturation
Protection, Dynamic Output, and Linear Regulator
General Description
The MAX1540A/MAX1541 dual pulse-width modulation
(PWM) controllers provide the high efficiency, excellent
transient response, and high DC-output accuracy nec-
essary for stepping down high-voltage batteries to gen-
erate low-voltage chipset and RAM power supplies in
notebook computers.
The Maxim proprietary Quick-PWM? controllers are
free running, constant on-time with input feed forward.
This configuration provides ultra-fast transient
response, wide input-output (I/O) differential range, low
supply current, and tight load-regulation characteris-
tics. The controllers can accurately sense the inductor
current across an external current-sense resistor in
series with the output to ensure reliable overload and
inductor saturation protection. Alternatively, the con-
trollers can use the synchronous rectifier itself or loss-
less inductor current-sensing methods to provide
overload protection with lower power dissipation.
For a single step-down PWM controller with inductor-
saturation protection, external-reference input voltage,
and dynamically selectable output voltages, refer to the
MAX1992/MAX1993 data sheet.
Applications
Notebook Computers
Core/I/O Supplies as Low as 0.7V
0.7V to 5.5V Supply Rails
CPU/Chipset/GPU with Dynamic Voltage Core
Supplies (MAX1541)
DDR Memory Termination (MAX1541)
Active Termination Buses (MAX1541)
Ordering Information
Features
? Inductor-Saturation Protection
? Accurate Differential Current-Sense Inputs
? Dual Ultra-High-Efficiency Quick-PWMs with
100ns Load-Step Response
? MAX1540A
1.8V/1.2V Fixed or 0.7V to 5.5V Adjustable
Output (OUT1)
2.5V/1.5V Fixed or 0.7V to 5.5V Adjustable
Output (OUT2)
Fixed 5V, 100mA Linear Regulator
? MAX1541
External Reference Input (REFIN1)
Dynamically Selectable Output Voltage—0.7V
to 5.5V (OUT1)
2.5V/1.8V Fixed or 0.7V to 5.5V Adjustable
Output (OUT2)
Optional Power-Good and Fault Blanking
During Transitions
Fixed 5V or Adjustable 100mA Linear Regulator
? 1% V OUT Accuracy over Line and Load
? 2V to 28V Battery Input Range
? 170kHz to 620kHz Selectable Switching
Frequency
? Overvoltage/Undervoltage-Protection Option
? 1.7ms Digital Soft-Start
? Drives Large Synchronous-Rectifier FETs
? 2V ±0.7% Reference Output
? Separate Power-Good Window Comparators
Pin Configurations
TOP VIEW
DH1
25
16
BST2
PART
TEMP RANGE
PIN-
PACKAGE
PKG
CODE
PGOOD1
OUT1
26
27
15
14
LX2
DH2
MAX1540A ETJ
MAX1540AETJ+
MAX1541 ETL
-40 ° C to +85 ° C
-40 ° C to +85 ° C
-40 ° C to +85 ° C
32 Thin QFN
5mm x 5mm
32 Thin QFN
5mm x 5mm
40 Thin QFN
6mm x 6mm
T3255-4
T3255-4
T4066-5
FB1
CSN1
CSP1
ON2
ON1
28
29
30
31
32
MAX1540A
13
12
11
10
9
PGOOD2
OUT2
FB2
CSN2
CSP2
MAX1541ETL+
-40 ° C to +85 ° C
40 Thin QFN
6mm x 6mm
T4066-5
+ Denotes a lead-free package.
Quick-PWM is a trademark of Maxim Integrated Products, Inc.
THIN QFN
A "+" SIGN WILL REPLACE THE FIRST PIN INDICATOR ON LEAD-FREE PACKAGES.
Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products
1
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
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| MAX1541EVKIT | 制造商:Maxim Integrated Products 功能描述:DUAL STEP-DOWN CONTROLLERS W. SATURATION PROT - Bulk |
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