参数资料
| 型号： | XRP7659ISTR-F |
| 厂商： | Exar Corporation |
| 文件页数： | 6/10页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 1.5A SOT-23-6 |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.81 V ~ 15 V |
| 输入电压： | 4.5 V ~ 18 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1.4MHz |
| 电流 - 输出： | 1.5A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-6 |
| 包装： | 标准包装 |
| 供应商设备封装： | SOT-23-6 |
| 其它名称： | 1016-1751-6 |
X R P 7 6 5 9
1 . 5 A 1 8 V 1 . 4 M H z N o n S y n c h r o n o u s S t e p - D o w n R e g u l a t o r
R 2 ?
? 1
Fig. 16: Onset of Over-voltage Protection, I OUT =1.5A
Fig. 18: Gain and Phase Margin Plots of XRP7659EVB
~60kHz Crossover frequency; ~50° Phase Margin
APPLICATION INFORMATION
The XRP7659 is a non-synchronous current-
mode step-down DC-DC converter capable of
driving a 1.5A load. The integrated high-side
MOSFET has been optimized to provide high
efficiency within XRP7659 operating ratings.
The high switching frequency of 1.4MHz allows
the use of a small inductor and a
correspondingly small output capacitor that
reduce the solution size and cost. The high
switching frequency also provides a very fast
transient response as shown in figure 11. The
built in loop compensation, bootstrap diode
and soft-start further reduce component cost.
A host of protection features including UVLO,
OCP, OTP, OVP and short-circuit help insure
Fig. 17: Over-voltage Recovery, I OUT =1.5A
safe operation under abnormal operating
conditions.
P ROGRAMMING THE OUTPUT VOLTAGE
To program V OUT use a resistor divider R1/R2
as shown in figure 1. R1 in conjunction with
the internal compensation comprises the loop
compensation. Calculate R2 from:
R 1
V OUT
0 . 81 V
A resistor selection guide for common values
of V OUT is shown in table 1.
? 2012 Exar Corporation
6/10
Rev. 1.2.0
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相关代理商/技术参数 |
参数描述 |
|---|---|
| XRP7662 | 制造商:EXAR 制造商全称:EXAR 功能描述:12A 300KHz Synchronous Step Down Regulator |
| XRP7662EVB | 制造商:EXAR 制造商全称:EXAR 功能描述:12A 300KHz Synchronous Step Down Regulator |
| XRP7662IH-F | 制造商:EXAR 制造商全称:EXAR 功能描述:12A 300KHz Synchronous Step Down Regulator |
| XRP7662IHTR-F | 制造商:EXAR 制造商全称:EXAR 功能描述:12A 300KHz Synchronous Step Down Regulator |
| XRP7664EVB | 功能描述:EVAL BOARD FOR XRP7664 RoHS:是 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:- 标准包装:1 系列:- 主要目的:DC/DC，步降 输出及类型:1，非隔离 功率 - 输出:- 输出电压:3.3V 电流 - 输出:3A 输入电压:4.5 V ~ 28 V 稳压器拓扑结构:降压 频率 - 开关:250kHz 板类型:完全填充 已供物品:板 已用 IC / 零件:L7981 其它名称:497-12113STEVAL-ISA094V1-ND |
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