参数资料
型号: TPS51317RGBR
厂商: Texas Instruments
文件页数: 14/28页
文件大小: 0K
描述: IC REG BUCK SYNC ADJ 6A 20VQFN
标准包装: 3,000
系列: D-Cap+™
类型: 降压(降压)
输出类型: 可调式
输出数: 1
输出电压: 0.6 V ~ 2 V
输入电压: 4.5 V ~ 6.5 V
PWM 型: 混合物
频率 - 开关: 800kHz,1MHz,1.2MHz,1.5MHz
电流 - 输出: 6A
同步整流器:
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 20-VFQFN 裸露焊盘
包装: 带卷 (TR)
供应商设备封装: 20-VQFN(3.5x4.0)
SLUSAH9 – MARCH 2011
Table 4. Mode Definitions
MODE
1
2
3
MODE RESISTANCE
(k Ω )
0
12
22
LIGHT-LOAD POWER
SAVING MODE
SKIP
SKIP
SKIP
SWITCHING
FREQUENCY
(f SW ) (MHz)
0.86
1.2
1.5
4
33
RR
(1)
1.0
5
6
7
8
47
68
100
OPEN
RR (1)
PWM
PWM
SKIP
0.86
1.2
1.5
1.0
(1)
Ripple reduction is a special light-load power saving feature. See ( Light-Load Power Saving Features )
Figure 9 shows the load regulation of the 1.5-V rail using an R DROOP value of 5 k Ω .
Figure 10 shows the transient response of the TPS51317 using droop configuration and C OUT = 6 × 22 μ F. The
applied step load is from 0 A to 3 A.
1.650
1.625
1.600
1.575
1.550
1.525
1.500
1.475
1.450
1.425
1.400
1.375
V IN =3.3 V
1.350
0
1
2
3 4
5
6
Output Current (A)
Figure 9. 1.5-V Load Regulation (V IN = 5 V)
Figure 10. Droop Configuration Transient
Response, C OUT = 6 x 22 μ F and 0 A to 3 A
14
Product Folder Link(s): TPS51317
Copyright ? 2011, Texas Instruments Incorporated
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