参数资料
| 型号： | TPS54160ADRCR |
| 厂商： | Texas Instruments |
| 文件页数： | 14/55页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 1.5A 10SON |
| 标准包装： | 3,000 |
| 系列： | SWIFT™, Eco-Mode™ |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.8 V ~ 58 V |
| 输入电压： | 3.5 V ~ 60 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 100kHz ~ 2.5MHz |
| 电流 - 输出： | 1.5A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 150°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-VFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 10-SON 裸露焊盘（3x3） |
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SLVSB56C – MAY 2012 – REVISED FEBRUARY 2014
Feature Description (continued)
quiescent current. While the device is in sleep mode the output power is delivered by the output capacitor. As the
load current decreases, the time the output capacitor supplies the load current increases and the switching
frequency decreases reducing gate drive and switching losses. As the output voltage drops, the TPS54160A
wakes up from the sleep mode and the power switch turns on to recharge the output capacitor, see Figure 25 .
The internal PLL remains operating when in sleep mode. When operating at light load currents in the pulse skip
mode the switching transitions occur synchronously with the external clock signal.
VOUT (ac)
I L
PH
Figure 25. Pulse Skip Mode Operation
8.3.4 Bootstrap Voltage (BOOT)
The TPS54160A has an integrated boot regulator and requires a small ceramic capacitor between the BOOT and
PH pin to provide the gate drive voltage for the high side MOSFET. The value of the ceramic capacitor should be
0.1 μ F. A ceramic capacitor with an X7R or X5R grade dielectric is recommended because of the stable
characteristics over temperature and voltage. To improve drop out, the TPS54160A is designed to operate at
100% duty cycle as long as the BOOT to PH pin voltage is greater than 2.1 V. When the voltage from BOOT to
PH drops below 2.1 V, the high side MOSFET is turned off using an UVLO circuit allowing for the low side diode
to conduct which allows refreshing of the BOOT capacitor. Since the supply current sourced from the BOOT
capacitor is low, the high side MOSFET can remain on for more switching cycles than it refreshes, thus, the
effective duty cycle limitation that is attributed to the boot regulator system is high.
8.3.5 Low Dropout Operation
The duty cycle during dropout of the regulator will be mainly determined by the voltage drops across the power
MOSFET, inductor, low side diode and printed circuit board resistance. During operating conditions in which the
input voltage drops, the high side MOSFET can remain on for 100% of the duty cycle to maintain output
regulation or until the BOOT to PH voltage falls below 2.1 V.
Once the high side is off, the low side diode will conduct and the BOOT capacitor will be recharged. During this
boot capacitor recharge time, the inductor current will ramp down until the high side MOSFET turns on. The
recharge time is longer than the typical high side off time of previous switching cycles, and thus, the inductor
current ripple is larger resulting in more ripple voltage on the output. The recharge time is a function of the input
voltage, boot capacitor value, and the impedance of the internal boot recharge diode.
Attention needs to be taken in maximum duty cycle applications which experience extended time periods without
a load current. When the voltage across the BOOT capacitors falls below the 2.1 V threshold in applications that
have a difference in the input voltage and output voltage that is less than 3V, the high side MOSFET will be
turned off but there is not enough current in the inductor to pull the PH pin down to recharge the boot capacitor.
The regulator will not switch because the boot capacitor is less than 2.1V and the output capacitor will decay until
the difference in the input voltage and output voltage is 2.1 V. At this time the boot under voltage lockout is
exceeded and the device will switch until the desired output voltage is reached.
14
Copyright ? 2012–2014, Texas Instruments Incorporated
Product Folder Links: TPS54160 TPS54160A
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| TPS54160ADRCT | 功能描述:直流/直流开关转换器 3.5-60Vin,1.5A SD Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| TPS54160DGQ | 功能描述:直流/直流开关调节器 3.5-60V 1.5A Step Down SWIFT 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 |
| TPS54160DGQG4 | 功能描述:直流/直流开关调节器 3.5-60V,1.5A Step Down SWIFT 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 |
| TPS54160DGQR | 功能描述:直流/直流开关调节器 3.5-60V 1.5A Step Down SWIFT 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 |
| TPS54160DGQRG4 | 功能描述:直流/直流开关调节器 3.5-60V,1.5A Step Down SWIFT 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 |
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