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参数资料
| 型号： | TPS62238DRY |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 1.22 A SWITCHING REGULATOR, 3800 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封装： | 1 X 1.50 MM, 0.60 MM HEIGHT, PLASTIC, MO-287UFAD, SON-6 |
| 文件页数： | 11/32页 |
| 文件大小： | 1073K |
| 代理商： | TPS62238DRY |
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f-Frequency
Noise
Stop
10MHz
400m
1MHz
10n
300m
200m
100m
700m
500m
1m
800m
900m
V
=2.7V(green)
IN
V
=3.6V(blue)
IN
V
=3V(red)
IN
V
=4.2V(yellow)
IN
600m
Start
0Hz
TPS62231
MODE=GND,
V
=1.8V,
R
L =2.2 H,
(MIPSZ20122R2,Size2012)
C
=4.7 F(Size0402)
OUT
LOAD
OUT
=100R
m
RefLvl=1mV
RBW30kHz
VBW30kHz
SWT28ms
TPS62231, TPS62230, TPS62232, TPS62233, TPS62234, TPS62235
TPS62236, TPS62237, TPS62238, TPS62239, TPS622310, TPS622311
TPS622312, TPS622313, TPS622314, TPS622315, TPS622316, TPS622317
www.ti.com
SLVS941D – APRIL 2009 – REVISED AUGUST 2010
TYPICAL CHARACTERISTICS (continued)
Figure 49. Spurious Output Noise, 100R Load, TPS62231
DETAILED DESCRIPTION
The TPS6223X synchronous step down converter family includes a unique hysteretic PWM controller scheme
which enables switch frequencies over 3MHz, excellent transient and AC load regulation as well as operation
with cost competitive external components.
The controller topology supports forced PWM Mode as well as Power Save Mode operation. Power Save Mode
operation reduces the quiescent current consumption down to 22mA and ensures high conversion efficiency at
light loads by skipping switch pulses.
In forced PWM Mode, the device operates on a quasi fixed frequency, avoids pulse skipping, and allows filtering
of the switch noise by external filter components.
The TPS6223X devices offer fixed output voltage options featuring smallest solution size by using only three
external components.
The internal switch current limit of typical 850mA supports output currents of up to 500mA, depending on the
operating condition.
A significant advantage of TPS6223X compared to other hysteretic PWM controller topologies is its excellent DC
and AC load regulation capability in combination with low output voltage ripple over the entire load range which
makes this part well suited for audio and RF applications.
OPERATION
Once the output voltage falls below the threshold of the error comparator, a switch pulse is initiated, and the high
side switch is turned on. It remains turned on until a minimum on time of tONmin expires and the output voltage
trips the threshold of the error comparator or the inductor current reaches the high side switch current limit. Once
the high side switch turns off, the low side switch rectifier is turned on and the inductor current ramps down until
the high side switch turns on again or the inductor current reaches zero.
In forced PWM Mode operation, negative inductor current is allowed to enable continuous conduction mode even
at no load condition.
POWER SAVE MODE
Connecting the MODE pin to GND enables the automatic PWM and power-save mode operation. The converter
operates in quasi fixed frequency PWM mode at moderate to heavy loads and in the PFM (Pulse Frequency
Modulation) mode during light loads, which maintains high efficiency over a wide load current range.
Copyright 2009–2010, Texas Instruments Incorporated
19
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PDF描述 |
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| TPS622315DRYT | 1.22 A SWITCHING REGULATOR, 3800 kHz SWITCHING FREQ-MAX, PDSO6 |
| TPS62236DRYR | 1.22 A SWITCHING REGULATOR, 3800 kHz SWITCHING FREQ-MAX, PDSO6 |
| TPS622310DRYT | 1.22 A SWITCHING REGULATOR, 3800 kHz SWITCHING FREQ-MAX, PDSO6 |
| TPS622313DRYR | 1.22 A SWITCHING REGULATOR, 3800 kHz SWITCHING FREQ-MAX, PDSO6 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS62238DRYR | 功能描述:直流/直流开关转换器 3MHz 500mA 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 |
| TPS62238DRYT | 功能描述:直流/直流开关转换器 3MHz 500mA 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 |
| TPS62239DRYR | 功能描述:直流/直流开关转换器 3MHz 500mA 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 |
| TPS62239DRYT | 功能描述:直流/直流开关转换器 3MHz 500mA 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 |
| TPS62239EVM-574 | 功能描述:电源管理IC开发工具 TPS62239 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 |
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