参数资料
| 型号： | MAX1515ETG+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/24页 |
| 文件大小： | 0K |
| 描述： | IC REG DDR LV 24-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | 转换器，DDR |
| 输入电压： | 1.3 V ~ 3.6 V |
| 输出数： | 2 |
| 输出电压： | 0.5 V ~ 2.7 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-WFQFN 裸露焊盘 |
| 供应商设备封装： | 24-TQFN-EP（4x4） |
| 包装： | 带卷 (TR) |
Low-Voltage, Internal Switch,
Step-Down/DDR Regulator
Pin Description
PIN
1, 2
3
4
5
6
7
8
9
10
11
12
13
14
NAME
PGND
IC
V DD
REFOUT
SS
PGOOD
TOFF
FB
COMP
V CC
GND
REF
REFIN
FUNCTION
Power Ground. Internal connection to the source of the internal synchronous-rectifier switch. Connect
both PGND pins together.
Internally Connected Pin. Connect to PGND.
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.
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.
Soft-Start. Connect a capacitor from SS to GND to limit the inrush current during startup.
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.
Off-Time Select Input. Connect a resistor from TOFF to GND to adjust the off-time.
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.
Integrator Compensation. Connect a 470pF capacitor from COMP to V CC for integrator
compensation.
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.
Analog Ground. Connect exposed backside pad to GND.
+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.
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.
Shutdown Control. Low disables the switching regulator. SHDN and MODE select the operational
mode of the MAX1515.
SHDN
MODE
Description
15
16
17
SHDN
MODE
FBSEL0
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
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.
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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