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参数资料
型号： MAX1515
厂商： Maxim Integrated Products, Inc.
英文描述： Low-Voltage, Internal Switch, Step-Down/DDR Regulator
中文描述： 低电压、内置开关、降压型/DDR稳压器
文件页数： 12/24页
文件大小： 504K
代理商： MAX1515
M
Low-Voltage, Internal Switch,
Step-Down/DDR Regulator
12
______________________________________________________________________________________
Standard Application Circuit
The MAX1515 standard application circuit (Figure 1)
generates a tracking output voltage and a reference
buffer output required for DDR termination regulators.
See Table 1 for component selections. Table 2 lists the
component manufacturers.
Detailed Description
The MAX1515 synchronous, current-mode, constant
off-time, PWM DC-DC converter steps down an input
voltage (V
IN
) from +1.3V to +3.6V to an output voltage
from +0.5V to +2.7V. The MAX1515 output delivers up
to 3A of continuous current. Internal 40m
Ω
NMOS
power switches improve efficiency, reduce component
count, and eliminate the need for a boost diode or any
external Schottky diodes (Figure 2).
Pin Description (continued)
PIN
NAME
FUNCTION
18
FBSEL1
Used with FBSEL0 to set the output voltage of the step-down regulator when MODE = GND.
Connect to GND if MODE = V
CC
.
19
SKIP
Pulse-Skipping Control Input. Connect to V
CC
for low-noise, forced-PWM mode. Connect to GND to
enable automatic pulse-skipping operation.
20
BST
Boost Flying-Capacitor Connection. Connect an external 0.01μF capacitor as shown in the standard
application circuit (Figure 1).
21, 22
LX
Inductor Switched Node. LX is the connection for the source of the high-side NMOS power switch
and drain of the low-side NMOS synchronous-rectifier switch. Connect both LX pins together.
23, 24
IN
Power Input. Supply voltage input for the switching regulator. Connect to a +1.3V to +3.6V supply
voltage. Connect both IN pins together.
Table 1. Component Selection for Standard Applications
COMPONENT
±2A AT 1.25V
OUT
DDR MODE (MODE = V
CC
)
2.3V to 2.7V
1.25V
±2A AT 0.9V
OUT
DDR MODE (MODE = V
CC
)
1.6V to 2.0V
0.9V
Input Voltage (V
IN
)
Output Voltage (V
OUT
)
C
IN
, Input Capacitor
33μF, 6.3V, ceramic
TDK C3225XR0J336V
33μF, 6.3V, ceramic
TDK C3225XR0J336V
Switching Frequency (f
SW
)
250kHz
500kHz
250kHz
500kHz
L, Inductor
2.5μH, 4.5A, Sumida
CDRH8D28-2R5
1.2μH, 6.8A, Sumida
CDR7D28MN-1R2
2.5μH, 4.5A, Sumida
CDRH8D28-2R5
1.2μH, 6.8A, Sumida
CDR7D28MN-1R2
C
OUT
, Output Capacitor
330μF, 18m
Ω
Sanyo 2R5TPE330MI
POSCAP
220μF, 18m
Ω
Sanyo 2R5TPE220MI
POSCAP
330μF, 18m
Ω
Sanyo 2R5TPE330MI
POSCAP
220μF, 18m
Ω
Sanyo 2R5TPE220MI
POSCAP
R
TOFF
221k
Ω
, 1%
110k
Ω
, 1%
221k
Ω
, 1%
110k
Ω
, 1%
Table 2. Component Suppliers
SUPPLIER
WEBSITE
Coilcraft
Coiltronics
Kemet
Panasonic
Sanyo
Sumida
Taiyo Yuden
TDK
TOKO
www.coilcraft.com
www.coiltronics.com
www.kemet.com
www.panasonic.com
www.sanyo.com
www.sumida.com
www.t-yuden.com
www.component.tdk.com
www.tokoam.com
相关PDF资料
PDF描述
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相关代理商/技术参数
参数描述
MAX1515ETG 功能描述:直流/直流开关调节器 RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5
MAX1515ETG+ 功能描述:直流/直流开关调节器 3A 1MHz Step-Down DDR Regulator RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5
MAX1515ETG+T 功能描述:直流/直流开关调节器 3A 1MHz Step-Down DDR Regulator RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5
MAX1515ETG-T 功能描述:直流/直流开关调节器 RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5
MAX1515EVKIT 制造商:Maxim Integrated Products 功能描述:3A 1MHZ LOW-VOLTAGE INTERNAL SWI - Rail/Tube
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