- 您现在的位置：买卖IC网 > PDF目录17485 > MCP1601EV (Microchip Technology)BOARD EVALUATION FOR MCP1601 PDF资料下载
参数资料
| 型号： | MCP1601EV |
| 厂商： | Microchip Technology |
| 文件页数： | 11/22页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION FOR MCP1601 |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 1.8V，2.05V，2.45V ~ 3.28V |
| 电流 - 输出： | 500mA |
| 输入电压： | 2.7 ~ 5.5 V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 750kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | MCP1601 |
| 产品目录页面： | 664 (CN2011-ZH PDF) |
| 相关产品： | MCP1601-I/MS-ND - IC REG BUCK SYNC ADJ 0.5A 8MSOP MCP1601T-I/MS-ND - IC REG BUCK SYNC ADJ 0.5A 8MSOP |
MCP1601
4.2
Cross-Conduction Timing
4.3.3
INTERNAL SOFT START
Proper timing between turning on the P-Channel, high-
side MOSFET and turning off the N-Channel, low-side
MOSFET (and vice versa) is critical to obtaining high
efficiency. This delay between transitions is what limits
The MCP1601 completely integrates the soft start func-
tion and requires no external components. The soft
start time is typically 0.5 ms and is reset during over-
current and over-temperature shutdown.
the maximum duty cycle obtainable by the MCP1601.
The delay between transitions leads to more time when
the external inductor current is freewheeling through
4.3.4
OVER-TEMPERATURE
PROTECTION
the internal N-Channel body diode and leads to a
decrease in efficiency. If the timing delay is too short
and both the internal P-Channel MOSFET and N-
Channel MOSFET conduct, high peak currents will be
observed shooting through the device. This will also
reduce the operating efficiency. The MCP1601 inset
timing is integrated to optimize efficiency for the entire
line and load operating range of the device.
The MCP1601 protects the internal circuitry from over-
temperature conditions by sensing the internal device
temperature and shutting down when it reaches
approximately 160 ° C. The device will shut down, the
temperature will cool to approximately 150 ° C, soft start
will be enabled and normal operation will resume with
no external circuit intervention.
4.3
Integrated Protection Features
4.3.5
UNDER-VOLTAGE LOCKOUT
Protection from operating at sustained input voltages
4.3.1
SHUTDOWN
that are out of range is prevented with the integrated
By placing a logic low on the SHDN pin of the
MCP1601, the device will enter a low quiescent current
shutdown mode. This feature turns off all of the internal
bias and drivers within the MCP1601 in an effort to min-
imize the quiescent current. This feature is popular for
battery-operated, portable power applications. The
shutdown low quiescent current is typically 1 μ A.
Under-Voltage Lockout feature. When the input voltage
dips below 2.5V (typically), the MCP1601 will shutdown
and the soft start circuit will be reset. Normal operation
will resume when the input voltage is elevated above
2.7V, maximum. This hysteresis is provided to prevent
the device from starting with too low of an input voltage.
4.3.2
INTERNAL OSCILLATOR AND
SYNCHRONIZATION CAPABILITY
The internal oscillator is completely integrated and
requires no external components. The frequency is set
nominally to 750 kHZ in an effort to minimize the exter-
nal inductor and capacitor size needed for the BUCK
topology. In addition to the internal 750 kHz oscillator,
the MCP1601 is capable of being synchronized to an
external oscillator. The external oscillator frequency
must be greater than 850 kHz and less than 1 MHz. For
proper synchronization, the duty cycle of the external
synchronization clock must be between 10% and 90%.
The minimum low voltage level should be below 15% of
V IN and the high level of the clock should be above
45% of V IN . Rise and fall time requirements for the
external synchronization clock must be faster than
100 ns from 10% to 90%. When synchronizing to an
external clock, the MCP1601 will always operate in the
PWM mode in an effort to eliminate multiple switching
frequency ’ s and their harmonics.
? 2003 Microchip Technology Inc.
DS21762A-page 11
相关PDF资料 |
PDF描述 |
|---|---|
| PV32H253A02B00 | TRIMMER 25K OHM 0.5W TH |
| 8Y-26.000MEEQ-T | CRYSTAL 26.000 MHZ 10PF SMD |
| PV32H252A02B00 | TRIMMER 2.5K OHM 0.5W TH |
| 8Y-24.000MEEQ-T | CRYSTAL 24.000 MHZ 10PF SMD |
| PV32H251A02B00 | TRIMMER 250 OHM 0.5W TH |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MCP1601-I/MS | 功能描述:开关变换器、稳压器与控制器 500mA Sych Buck RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| MCP1601-I/MS | 制造商:Microchip Technology Inc 功能描述:BUCK CONVERTER SMD 1601 MSOP8 |
| MCP1601T-I/MS | 功能描述:开关变换器、稳压器与控制器 500mA Sych Buck RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| MCP1602 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:2.0 MHz, 500 mA Synchronous Buck Regulator with Power-Good |
| MCP1602-080I/MF | 功能描述:开关变换器、稳压器与控制器 20MHz 05A Synch-Buck PFM/PWM Reg RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
发布紧急采购，3分钟左右您将得到回复。