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| 型号： | MAX1544ETL+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 16/42页 |
| 文件大小： | 0K |
| 描述： | IC QUICK-PWM DUAL-PHASE 40-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 系列： | Quick-PWM™ |
| 应用： | 控制器，AMD Hammer |
| 输入电压： | 2 V ~ 28 V |
| 输出数： | 1 |
| 输出电压： | 0.68 V ~ 1.55 V |
| 工作温度： | -40°C ~ 100°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-WFQFN 裸露焊盘 |
| 供应商设备封装： | 40-TQFN-EP（6x6） |
| 包装： | 管件 |
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Dual-Phase, Quick-PWM Controller for
AMD Hammer CPU Core Power Supplies
Pin Description (continued)
PIN
32
33
34
35
36
37
38
39
40
NAME
DLS
DHS
LXS
BSTS
V+
CMP
CMN
CSN
CSP
FUNCTION
Secondary Low-Side Gate-Driver Output. DLS swings from PGND to V DD . DLS is forced high after the
MAX1544 powers down.
Secondary High-Side Gate-Driver Output. Swings LXS to BSTS.
Secondary Inductor Connection. LXS is the internal lower supply rail for the DHS high-side gate
driver.
Secondary Boost Flying Capacitor Connection. An optional resistor in series with BSTS allows the
DHS pullup current to be adjusted.
Battery Voltage-Sense Connection. Used only for PWM one-shot timing. DH_ on-time is inversely
proportional to input voltage over a range of 4V to 28V.
Main Inductor Positive Current-Sense Input
Main Inductor Negative Current-Sense Input
Secondary Inductor Positive Current-Sense Input
Secondary Inductor Negative Current-Sense Input
Detailed Description
Dual 180° Out-of-Phase Operation
The two phases in the MAX1544 operate 180 ° out-of-
phase ( SKIP = REF or high) to minimize input and output
filtering requirements, reduce electromagnetic interfer-
ence (EMI), and improve efficiency. This effectively low-
ers component count — reducing cost, board space, and
component power requirements — making the MAX1544
ideal for high-power, cost-sensitive applications.
Typically, switching regulators provide transfer power
using only one phase instead of dividing the power
among several phases. In these applications, the input
capacitors must support high-instantaneous current
requirements. The high-RMS ripple current can lower
efficiency due to I 2 R power loss associated with the input
capacitor ’ s effective series resistance (ESR). Therefore,
the system typically requires several low-ESR input
capacitors in parallel to minimize input voltage
ripple, to reduce ESR-related power losses, and to meet
the necessary RMS ripple current rating.
With the MAX1544, the controller shares the current
between two phases that operate 180 ° out-of-phase, so
the high-side MOSFETs never turn on simultaneously
during normal operation. The instantaneous input cur-
rent of either phase is effectively cut in half, resulting in
reduced input voltage ripple, ESR power loss, and RMS
ripple current (see the Input Capacitor Selection sec-
tion). As a result, the same performance can be
achieved with fewer or less-expensive input capacitors.
Table 1 lists component selection for standard multi-
phase selections and Table 2 is a list of component
suppliers.
Transient Overlap Operation
When a transient occurs, the response time of the con-
troller depends on how quickly it can slew the inductor
current. Multiphase controllers that remain 180 degrees
out-of-phase when a transient occurs actually respond
slower than an equivalent single-phase controller. In
order to provide fast transient response, the MAX1544
supports a phase-overlap mode, which allows the dual
regulators to operate in-phase when heavy-load tran-
sients are detected, reducing the response time. After
either high-side MOSFET turns off, if the output voltage
does not exceed the regulation voltage when the mini-
mum off-time expires, the controller simultaneously
turns on both high-side MOSFETs during the next on-
time cycle. This maximizes the total inductor current
slew rate. The phases remain overlapped until the out-
put voltage exceeds the regulation voltage after the
minimum off-time expires.
16
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1544ETL+ | 功能描述:电压模式 PWM 控制器 Dual-Phase Quick-PWM Controller RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| MAX1544ETL+T | 功能描述:电压模式 PWM 控制器 Dual-Phase Quick-PWM Controller RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| MAX1544ETL+TG075 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX1544ETL-T | 功能描述:电压模式 PWM 控制器 RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| MAX1544EVKIT | 制造商:Maxim Integrated Products 功能描述:DUAL-PHASE, QUICK-PWM CONTROLLER FOR AMD HAMM - Bulk |
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