- 您现在的位置：买卖IC网 > PDF目录199467 > TPS5103IDBG4 (TEXAS INSTRUMENTS INC) 3 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO20 PDF资料下载
参数资料
| 型号： | TPS5103IDBG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 3 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封装： | GREEN, PLASTIC, SSOP-20 |
| 文件页数： | 34/40页 |
| 文件大小： | 1225K |
| 代理商： | TPS5103IDBG4 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页当前第34页第35页第36页第37页第38页第39页第40页
TPS5103
MULTIPLE MODE SYNCHRONOUS DC/DC CONTROLLER
SLVS240A – SEPTEMBER 1999 – REVISED MAY 2001
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
detailed description
REF
The reference voltage is used for the output voltage setting and the voltage protection(COMP). The tolerance
is 1.5% typically.
VREF5
An internal linear voltage regulator is used for the high-side driver bootstrap voltage. Since the input voltage
range is from 4.5 V to 25 V, this voltage offers a fixed voltage for the bootstrap voltage so that the design for
the bootstrap is much easier. The tolerance is 6%.
hysteretic comparator
The hysteretic comparator is used to regulate the output voltage of the synchronous-buck converter. The
hysteresis is set internally and is typically 9.7 mV. The total delay time from the comparator input to the driver
output is typically 400 ns for going both high and low.
error amplifier
The error amplifier is used to sense the output voltage of the synchronous buck converter. The negative input
of the error amplifier is connected to the VREF (1.185 V) with a resistive divider network. The output of the error
amplifier is brought out to the FB terminal to be used for loop-gain compensation.
low-side driver
The low-side driver is designed to drive low-rds(on) n-channel MOSFETs. The maximum drive voltage is 5 V from
VREF5. The current rating of the driver is typically 1.2 A at sink current, and –1.5 A at source current.
high-side driver
The high-side driver is designed to drive low-rds(on) n-channel MOSFETs. The current rating of the driver is 1.2 A
at sink current, and –1.7 A at source current. When configured as a floating driver, the bias voltage to the driver
is developed from VREF5, limiting the maximum drive voltage between OUT_u and LL to 5 V. The maximum
voltage that can be applied between LH and OUTGND is 30 V.
driver deadtime control
The deadtime control prevents shoot-through current from flowing through the main power FETs. During
switching transitions the
deadtime control actively controls the turnon time of the MOSFET drivers. The typical
deadtime from the low-side-driver-off to the high-side-driver-on is 90 ns, and 110 ns from high-side-driver-off
to low-side-driver-on.
COMP
COMP is designed for use with a regulation-output monitor. COMP also functions as an internal comparator
used for any voltage protection such as the input under voltage protection. If the input voltage is lower than the
setpoint, the comparator turns off and prevents external parts from being damaged. The investing terminal of
the comparator is internally connected to REF (1.185
V).
current protection
Current protection is achieved by sensing the high-side power MOSFET drain-to-source voltage drop during
on-time through VCC_SENSE and LL terminals. An external resistor between VREG5V_IN and TRIP, with the
an internal current source connected to the current comparator negative input, adjusts the current limit. The
typical internal current source value is 15
A in PWM mode, and 5 A in SKIP mode. When the voltage on the
positive terminal is lower than the negative terminal, the current comparator turns on the trigger, and then
activates the oscillator. This oscillator repeatedly resets the trigger until the overcurrent condition is removed.
The capacitor on the CT terminal can be open or added to adjust the reset frequency.
相关PDF资料 |
PDF描述 |
|---|---|
| TPS54680PWP | 12 A SWITCHING REGULATOR, 762 kHz SWITCHING FREQ-MAX, PDSO28 |
| TPS54872PWP | 12 A SWITCHING REGULATOR, 762 kHz SWITCHING FREQ-MAX, PDSO28 |
| TPS54972PWP | 16 A SWITCHING REGULATOR, 762 kHz SWITCHING FREQ-MAX, PDSO28 |
| TPS5510D | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| TPS59124RGET | SWITCHING CONTROLLER, PQCC24 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS5103IDBR | 功能描述:DC/DC 开关控制器 Synch Buck Cntrlr RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| TPS5103IDBRG4 | 功能描述:DC/DC 开关控制器 Synch Buck Cntrlr RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| TPS5110 | 制造商:TI 制造商全称:Texas Instruments 功能描述:3-A SINK/ SOURCE DDR TERMINATION REGULATOR |
| TPS51100 | 制造商:TI 制造商全称:Texas Instruments 功能描述:3-A SINK/SOURCE DDR TERMINATION REGULATOR |
| TPS51100_07 | 制造商:TI 制造商全称:Texas Instruments 功能描述:3-A SINK/SOURCE DDR TERMINATION REGULATOR |
发布紧急采购，3分钟左右您将得到回复。