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参数资料
| 型号： | TPS62060DSGT |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 1.6 A SWITCHING REGULATOR, 3400 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | 2 X 2 MM, 0.75 MM HEIGHT, GREEN, PLASTIC, WSON-8 |
| 文件页数： | 9/26页 |
| 文件大小： | 1109K |
| 代理商： | TPS62060DSGT |
SLVSA95A
– MARCH 2010 – REVISED JANUARY 2011
Take care when using only small ceramic input capacitors. When a ceramic capacitor is used at the input and the
power is being supplied through long wires, such as from a wall adapter, a load step at the output or VIN step on
the input can induce ringing at the VIN pin. This ringing can couple to the output and be mistaken as loop
instability or could even damage the part by exceeding the maximum ratings.
Table 3. List of Capacitors
CAPACITANCE
TYPE
SIZE [mm3]
SUPPLIER
10mF
GRM188R60J106M
0603: 1.6 x 0.8 x 0.8
Murata
22mF
GRM188R60G226M
0603: 1.6 x 0.8 x 0.8
Murata
22
F
CL10A226MQ8NRNC
0603: 1.6 x 0.8 x 0.8
Samsung
10
F
CL10A106MQ8NRNC
0603: 1.6 x 0.8 x 0.8
Samsung
CHECKING LOOP STABILITY
The first step of circuit and stability evaluation is to look from a steady-state perspective at the following signals
Switching node, SW
Inductor current, IL
Output ripple voltage, VOUT(AC)
These are the basic signals that need to be measured when evaluating a switching converter. When the
switching waveform shows large duty cycle jitter or the output voltage or inductor current shows oscillations, the
regulation loop may be unstable. This is often a result of board layout and/or wrong L-C output filter
combinations. As a next step in the evaluation of the regulation loop, the load transient response is tested. The
time between the application of the load transient and the turn on of the P-channel MOSFET, the output
capacitor must supply all of the current required by the load. VOUT immediately shifts by an amount equal to
ΔI(LOAD) x ESR, where ESR is the effective series resistance of COUT. ΔI(LOAD) begins to charge or discharge CO
generating a feedback error signal used by the regulator to return VOUT to its steady-state value. The results are
most easily interpreted when the device operates in PWM mode at medium to high load currents.
During this recovery time, VOUT can be monitored for settling time, overshoot, or ringing; that helps evaluate
stability of the converter. Without any ringing, the loop has usually more than 45
° of phase margin.
2010–2011, Texas Instruments Incorporated
17
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相关代理商/技术参数 |
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|---|---|
| TPS62060DSGT | 制造商:Texas Instruments 功能描述:STEP DOWN DC/DC CONVERTER IC |
| TPS62060EVM-663 | 功能描述:电源管理IC开发工具 TPS62060EVM-663 Eval Mod 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 |
| TPS62061DSGR | 功能描述:直流/直流开关转换器 3MHz,1.6A Step-Down 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 |
| TPS62061DSGT | 功能描述:直流/直流开关转换器 3MHz,1.6A Step-Down 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 |
| TPS62063DSGR | 功能描述:直流/直流开关转换器 3MHz,1.6A Step-Down 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 |
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