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| 型号： | TPS54900PWR |
| 厂商： | Texas Instruments |
| 文件页数： | 6/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ .1A QUAD 16TSSOP |
| 标准包装： | 2,000 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 4 |
| 输出电压： | 7.5 V ~ 13.1 V |
| 输入电压： | 15V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 450kHz |
| 电流 - 输出： | 100mA |
| 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： | 16-TSSOP（0.173"，4.40mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 16-TSSOP |
| 配用： | 296-17304-ND - EVAL MODULE FOR XILINX FPGA |
TPS54900
SLVS405 ? OCTOBER 2001
detailed description (continued)
enable (EN)
If the EN pin is held low when the TPS54900 is powered up, the oscillator starts and free-runs. Serial commands
to initialize the PWM clocks and program the output levels are accepted, but the outputs are held off and do not
begin regulating until the EN pin is pulled above V IH .
If the TPS54900 is first programmed with outputs enabled and then EN is pulled LOW, all outputs are shut off
and all DACs are reset. The EN pin does not affect the oscillator, which continues to run and maintain PWM
phase stagger. The previously programmed channel voltages are also maintained in the registers. If EN is pulled
above V IH , the TPS54900 channels start up through the soft-start sequence and reach regulation at the
previously programmed target voltages.
Bypass mode may be forced on all outputs by pulling EN above VIN – 0.5 V. When bypass mode is forced, all
four channels step up to VIN in 200-mV increments.
over current protection
During steady state operation, the overcurrent protection threshold is 250 mA minimum, 750 mA maximum,
sampled approximately 500 ns after the start of the switching cycle. When overcurrent is sensed in the
PMOSFET, the output is disabled for a hiccup time of 170 ms to 360 ms (SCLK = 4.416 MHz). In the
pass-through mode, the overcurrent detection remains active and the hiccup behavior is unchanged.
thermal shutdown
Thermal shutdown disables the controller if the junction temperature exceeds 150 ° C. The hysteresis is 10 ° C.
This shuts down off the switching circuitry and resets the soft-start circuitry. If the IC returns to normal
temperature, it restarts and returns to the programmed target voltages.
serial control interface timing diagram
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
SFS
SCLK
SDI
R/W ADR 2 ADR 1 ADR 0
S3
S2
S1
S0
D7
D6
D5
D4
D3
D2
D1
D0
SDO
(Read: R/W = 1)
High?Z
D7
D6
D5
D4
D3
D2
D1
D0
High?Z
6
SDO
(Write: R/W = 0)
High?Z
www.ti.com
High?Z
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相关代理商/技术参数 |
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|---|---|
| TPS54900PWRG4 | 功能描述:开关变换器、稳压器与控制器 Prog 4-Ch Step Dwn DC/DC Converter 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 |
| TPS54910 | 制造商:TI 制造商全称:Texas Instruments 功能描述:3-V TO 4-V INPUT, 9-A OUTPUT SYNCHRONOUS BUCK PWM SWITCHER WITH INTEGRATED FETs (SWIFT) |
| TPS54910EVM-213 | 功能描述:电源管理IC开发工具 9-A 3-4 Vin DC/DC Converter RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| TPS54910PWP | 功能描述:直流/直流开关调节器 3.3V Inp 9A Sync Buck Converter 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 |
| TPS54910PWP | 制造商:Texas Instruments 功能描述:IC's |
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