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参数资料
| 型号： | MAX8805WEWEAA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 12/24页 |
| 文件大小： | 0K |
| 描述： | IC PWM STEP-DN CONV 650MA 16-WLP |
| 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，WCDMA PA 电源 |
| 输入电压： | 2.7 V ~ 5.5 V |
| 输出数： | 1 |
| 输出电压： | 0.4 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-UFBGA，WLCSP |
| 供应商设备封装： | 16-WLP（2x2） |
| 包装： | 带卷 (TR) |
600mA/650mA PWM Step-Down Converters in
2mm x 2mm WLP for WCDMA PA Power
Pin Description
PIN
A1
A2
A3
A4
B1
B2
B3
B4
C1
C2
C3, C4
D1
D2
NAME
REFBP
AGND
REFIN
PGND
LDO2
PA_EN
EN2
LX
IN2
HP
IN1B,
IN1A
LDO1
EN1
FUNCTION
Reference Noise Bypass. Bypass REFBP to AGND with a 0.22μF ceramic capacitor to reduce noise on the
LDO outputs. REFBP is internally pulled down through a 1k ? resistor during shutdown.
Low-Noise Analog Ground
DAC-Controlled Input. The output of the PA step-down converter is regulated to 2 x V REFIN for the
MAX8805Y/MAX8805Z and 2.5 x V REFIN for the MAX8805W/MAX8805X. When V REFIN reaches 0.465 x V IN2
for the MAX8805Y/MAX8805Z and 0.372 x V IN2 for the MAX8805W/MAX8805X, bypass mode is enabled.
Power Ground for PA Step-Down Converter
200mA LDO Regulator 2 Output. Bypass LDO2 with a 1μF ceramic capacitor as close as possible to LDO2
and AGND. LDO2 is internally pulled down through a 1k ? resistor when this regulator is disabled.
PA Step-Down Converter Enable Input. Connect to IN_ or logic-high for normal operation. Connect to GND
or logic-low for shutdown mode.
LDO2 Enable Input. Connect to IN2 or logic-high for normal operation. Connect to AGND or logic-low for
shutdown mode.
Inductor Connection. Connect an inductor from LX to the output of the PA step-down converter.
Supply Voltage Input for LDO1, LDO2, and Internal Reference. Connect IN2 to a battery or supply voltage
from 2.7V to 5.5V. Bypass IN2 with a 2.2μF ceramic capacitor as close as possible to IN2 and AGND.
Connect IN2 to the same source as IN1A and IN1B.
High-Power Mode Set Input. Drive HP high to invoke forced bypass mode. Bypass mode connects the
input of the PA step-down converter directly to its output through the internal bypass MOSFET. Drive HP
low to disable the forced bypass mode.
Supply Voltage Input for PA Step-Down Converter. Connect IN1_ to a battery or supply voltage from 2.7V to
5.5V. Bypass the connection of IN1_ with a 2.2μF ceramic capacitor as close as possible to IN1_, and
PGND. IN1A and IN1B are internally connected together. Connect IN1_ to the same source as IN2.
200mA LDO Regulator 1 Output. Bypass LDO1 with a 1μF ceramic capacitor as close as possible to LDO1
and AGND. LDO1 is internally pulled down through a 1k ? resistor when this regulator is disabled.
LDO1 Enable Input. Connect to IN2 or logic-high for normal operation. Connect to AGND or logic-low for
shutdown mode.
PA Connection for Bypass Mode. Internally connected to IN1_ using the internal bypass MOSFET during
D3, D4
PAB, PAA bypass mode. PA_ is connected to the internal feedback network. Bypass PA_ with a 2.2μF ceramic
capacitor as close as possible to PA_ and PGND.
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