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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： | 11/24页 |
| 文件大小： | 504K |
| 代理商： | MAX1515 |
M
Low-Voltage, Internal Switch,
Step-Down/DDR Regulator
______________________________________________________________________________________
11
Pin Description
PIN
NAME
FUNCTION
1, 2
PGND
Power Ground. Internal connection to the source of the internal synchronous-rectifier switch. Connect
both PGND pins together.
3
IC
Internally Connected Pin. Connect to PGND.
4
V
DD
Supply Input for the Low-Side Gate Drive and REFOUT Buffer. Connect to the system supply voltage,
+3.0V to +3.6V. Bypass to PGND with a 1μF (min) ceramic capacitor. V
DD
supplies power to the
drivers and the REFOUT buffer.
5
REFOUT
REFIN Buffered Output. REFOUT provides a buffered output voltage of REFIN when MODE = V
CC
.
Bypass to GND with a 0.47μF ceramic capacitor. REFOUT is disabled when MODE = GND.
6
SS
Soft-Start. Connect a capacitor from SS to GND to limit the inrush current during startup.
7
PGOOD
Power-Good Open-Drain Output. PGOOD is low when the output voltage is more than 10% above or
below the normal regulation point. PGOOD is high impedance when the output is in regulation.
PGOOD is low in shutdown.
8
TOFF
Off-Time Select Input. Connect a resistor from TOFF to GND to adjust the off-time.
9
FB
Feedback Input.
In DDR mode (MODE = V
CC
), FB regulates to the voltage at REFIN.
In non-DDR mode (MODE = GND), connect directly to the output for preset voltage operation or to a
resistive voltage-divider for adjustable-mode operation.
10
COMP
Integrator Compensation. Connect a 470pF capacitor from COMP to V
CC
for integrator
compensation.
11
V
CC
Analog Supply Input. Connect to the system supply voltage, +3.0V to +3.6V, with a series 10
Ω
resistor. Bypass to GND with a 1μF (min) ceramic capacitor.
12
GND
Analog Ground. Connect exposed backside pad to GND.
13
REF
+1.1V Reference Voltage Output. Bypass to GND with a 1.0μF bypass capacitor. Can supply 50μA
for external loads. Reference turns off in shutdown.
14
REFIN
External Reference Input. In DDR mode (MODE = V
CC
), REFIN sets the voltage that FB regulates to.
In non-DDR mode (MODE = GND), connect REFIN to REF.
15
SHDN
Shutdown Control. Low disables the switching regulator.
SHDN
and MODE select the operational
mode of the MAX1515.
SHDN
MODE
Description
Low
Low
Step-down regulator and REFOUT OFF
Low
High
Step-down regulator OFF, REFOUT active
High
Low
Step-down regulator ON, non-DDR mode, REFOUT OFF
High
High
Step-down regulator ON, DDR mode, REFOUT active
16
MODE
Mode-Select Pin. Mode sets the regulator into DDR mode or non-DDR operation mode, and controls
the REFOUT buffer. When MODE = V
CC
, MAX1515 is set in DDR mode and REFOUT is active. When
MODE = GND, MAX1515 is set in non-DDR mode and REFOUT is disabled. See the
Modes of
Operation (MODE)
section.
17
FBSEL0
Used with FBSEL1 to set the output voltage of the step-down regulator when MODE = GND.
Connect to GND if MODE = V
CC
.
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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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