参数资料
| 型号： | MAX1821EUB+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 10/18页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK WCDMA 10-UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 应用： | 转换器，WCDMA 功率放大器应用 |
| 输入电压： | 2.6 V ~ 5.5 V |
| 输出数： | 1 |
| 输出电压： | 1.25 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-µMAX |
| 包装： | 管件 |
WCDMA Cellular Phone 600mA
Buck Regulators
BATT
VOLTAGE
REFERENCE
1.25V
TO
IC BIAS
ERROR SIGNAL
PWM
COMPARATOR
GND
SLOPE COMP
OUT
REF
TRANSIMPEDANCE
ERROR AMP
CLAMP
CURRENT SENSE
SKIP THRESHOLD
SKIP
COMPARATOR
PWM CONTROL
AND
SKIP LOGIC
LX
PGND
MAX1820
÷ 13 OR
÷ 18
1MHz
OSCILLATOR
Figure 1. MAX1820 Simplified Functional Diagram (No SYNC for MAX1820Z)
BATT
VOLTAGE
REFERENCE
1.25V
TO
IC BIAS
ERROR SIGNAL
PWM
COMPARATOR
GND
SLOPE COMP
OUT
REF
TRANSIMPEDANCE
ERROR AMP
CLAMP
CURRENT SENSE
SKIP THRESHOLD
SKIP
COMPARATOR
PWM CONTROL
AND
SKIP LOGIC
LX
PGND
1MHz
MAX1821
OSCILLATOR
Figure 2. MAX1821 Simplified Functional Diagram (No SYNC for MAX1821)
ing each cycle, using the PWM comparator. The power
transferred to the load is adjusted by changes in the
inductor peak current limit during the first half of each
cycle, based on the output error voltage.
A new cycle begins at each falling edge of the internal
oscillator. The controller turns on the P-channel MOS-
FET to increase the inductor current, and the slope
compensation block initiates a new reference current
ramp that is summed with the internal P-channel MOS-
FET current (Figures 1 and 2).
The second half of the cycle begins when the reference
ramp is greater than the error voltage. The P-channel
MOSFET is turned off, the synchronous rectifier is
turned on, and inductor current continues to flow to the
output capacitor. The output capacitor stores charge
when the current is high and releases it when the
inductor current is low, smoothing the voltage across
10
______________________________________________________________________________________
相关PDF资料 |
PDF描述 |
|---|---|
| GMC18DRAI-S734 | CONN EDGECARD 36POS .100 R/A SLD |
| RMC25DRTH-S13 | CONN EDGECARD 50POS .100 EXTEND |
| MCP1801T-3002I/OT | IC REG LDO 3V .15A SOT23-5 |
| HSC25DRTS-S13 | CONN EDGECARD 50POS .100 EXTEND |
| UVY1V331MPD | CAP ALUM 330UF 35V 20% RADIAL |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1821EUB+ | 功能描述:直流/直流开关调节器 WCDMA 600mA Buck 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 |
| MAX1821EUB+T | 功能描述:直流/直流开关调节器 WCDMA 600mA Buck 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 |
| MAX1821EUB-T | 功能描述:直流/直流开关调节器 WCDMA 600mA Buck 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 |
| MAX1821EUB-TG069 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX1821XEBC | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
发布紧急采购，3分钟左右您将得到回复。