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AT73C204
Functional Description
300 mA/1.9V/2.5V DC-to-
DC Converter for
Co-processor Core
This DC-to-DC converter is a synchronous mode DC-to-DC “buck”-switched regulator
using fixed- frequency architecture (PWM) and capable of providing 300 mA of continu-
ous current. It has two levels of voltage programming for the co-processor core (1.9V or
2.5V). The operating supply range is from 3.1V to 4.2V, making it suitable for Li-Ion, Li-
polymer or Ni-MH battery applications. This DC-to-DC converter is based on the pulse
width modulation architecture to control the noise perturbation for switching noise sensi-
tive applications (GSM). The operating frequency is set to 900 KHz using an internal
clock, allowing the use of small surface inductor and moderate output voltage ripple.
The controller consists of a reference ramp generator, a feedback comparator, the logic
driver used to drive the internal switches, the feedback circuits used to manage the dif-
ferent modes of operation and the over-current protection circuits. An economic mode
has been defined to reduce quiescent current. A low-dropout voltage regulator in paral-
lel to the DC-to-DC converter minimizes standby current consumption during standby
mode.
Figure 4. Dual-power DC-to-DC Converter
V BAT
DM
DC-to-DC Buck
1.9V or 2.5V
300 mA
Internal FET
LDO
L
C
V OUT0
1.9V or 2.5V
10 mA
Low Power
Low undershoot voltage is expected when going from PWM to LDO mode and vice-
versa. The circuit is designed in order to avoid any spikes when transition between two
modes is enabled.
Figure 5. Low-power/Full-power DC-to-DC Converter Transition
V OUT0
V OUT0
DM
High Power
Low Power
DM
High Power
Low Power
7
6014A–PMGMT–10/03
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相关代理商/技术参数
AT73C204-EK1
功能描述:开发板和工具包 - ARM COMPLETE EVAL KIT
RoHS:否 制造商:Arduino 产品:Development Boards 工具用于评估:ATSAM3X8EA-AU 核心:ARM Cortex M3 接口类型:DAC, ICSP, JTAG, UART, USB 工作电源电压:3.3 V
AT73C204-EK2
功能描述:开发板和工具包 - ARM UNSOLDERED EVAL KIT
RoHS:否 制造商:Arduino 产品:Development Boards 工具用于评估:ATSAM3X8EA-AU 核心:ARM Cortex M3 接口类型:DAC, ICSP, JTAG, UART, USB 工作电源电压:3.3 V
AT73C204J
功能描述:电池管理 Monolithic numeric RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel
AT73C205
功能描述:其他电源管理 NGD MONOLITHIC NUMERIC IC RoHS:否 制造商:Texas Instruments 输出电压范围: 输出电流:4 mA 输入电压范围:3 V to 3.6 V 输入电流: 功率耗散: 工作温度范围:- 40 C to + 110 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-48 封装:Reel
AT73C206
制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:Power Management And Analog Companions (PMAAC)
AT73C209
功能描述:其他电源管理 NGD : MONOLITHIC NUMERIC IC RoHS:否 制造商:Texas Instruments 输出电压范围: 输出电流:4 mA 输入电压范围:3 V to 3.6 V 输入电流: 功率耗散: 工作温度范围:- 40 C to + 110 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-48 封装:Reel
AT73C209-EK
功能描述:开发板和工具包 - ARM AT73C209 EVALUATION BOARD
RoHS:否 制造商:Arduino 产品:Development Boards 工具用于评估:ATSAM3X8EA-AU 核心:ARM Cortex M3 接口类型:DAC, ICSP, JTAG, UART, USB 工作电源电压:3.3 V
AT73C211
制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:Power Management