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參數資料
| 型號： | TPS54320RHLR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | SWITCHING REGULATOR, 1320 kHz SWITCHING FREQ-MAX, PQCC14 |
| 封裝： | 3.50 X 3.50 MM, GREEN, PLASTIC, QFN-14 |
| 文件頁數： | 39/39頁 |
| 文件大小： | 1358K |
| 代理商： | TPS54320RHLR |
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V -InputVoltage-V
I
Icl-CurrentLimitedThreshold-
A
T =-40°C
J
T =25°C
J
T =150°C
J
70
80
90
100
110
120
MinimumControllableOnT
ime-ns
-50
-25
0
25
50
75
100
125
150
T -JunctionTemperature-°C
J
V =12V,
I =2 A
I
O
3
4
5
6
Dmin-MinimumControllableDutyRatio-%
-50
-25
0
25
50
75
100
125
150
T -JunctionTemperature-°C
J
RT =100k ,
V =12V,
I =2 A
W
I
O
2
2.05
2.1
2.15
2.2
V
-BOOT
-PHUVLOThreshold-
A
boot
m
-50
-25
0
25
50
75
100
125
150
T -JunctionTemperature-°C
J
www.ti.com
SLVS982A – AUGUST 2010 – REVISED SEPTEMBER 2010
TYPICAL CHARACTERISTICS (continued)
HIGH-SIDE CURRENT LIMIT THRESHOLD vs
MINIMUM CONTROLLABLE ON TIME vs
INPUT VOLTAGE
TEMPERATURE
Figure 13.
Figure 14.
MINIMUM CONTROLLABLE DUTY RATIO vs
JUNCTION TEMPERATURE
BOOT-PH UVLO THRESHOLD vs TEMPERATURE
Figure 15.
Figure 16.
OVERVIEW
The device is a 17-V, 3-A, synchronous step-down (buck) converter with two integrated n-channel MOSFETs. To
improve performance during line and load transients the device implements a constant frequency, peak current
mode control which also simplifies external frequency compensation. The wide switching frequency of 200 kHz to
1200 kHz allows for efficiency and size optimization when selecting the output filter components. The switching
frequency is adjusted using a resistor to ground on the RT/CLK pin. The device also has an internal phase lock
loop (PLL) controlled by the RT/CLK pin that can be used to synchronize the switching cycle to the falling edge
of an external system clock.
The device has been designed for safe monotonic startup into pre-biased loads. The default start up is when VIN
is typically 4.0V. The EN pin has an internal pull-up current source that can be used to adjust the input voltage
under voltage lockout (UVLO) with two external resistors. In addition, the EN pin can be left floating for the
device to automatically start with the internal pull-up current. The total operating current for the device is
approximately 600mA when not switching and under no load. When the device is disabled, the supply current is
typically less than 2mA.
The integrated MOSFETs allow for high efficiency power supply designs with continuous output currents up to 3
amperes. The MOSFETs have been sized to optimize efficiency for lower duty cycle applications.
Copyright 2010, Texas Instruments Incorporated
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Product Folder Link(s) :TPS54320
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TPS54320RHLT | 功能描述:直流/直流開關調節器 4.5-17V Inp3A Sync Step Down Cnvrtr RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS54320RHLT | 制造商:Texas Instruments 功能描述:IC SYNC STEP-DOWN CONTROLLER 1.2MHZ Q 制造商:Texas Instruments 功能描述:IC, SYNC STEP-DOWN CONTROLLER, 1.2MHZ, QFN-14 |
| TPS54325 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:4.5-V to 18-V, 3-A OUTPUT SYNCHRONOUS STEP DOWN SWITCHER WITH INTEGRATED FET (SWIFT?) |
| TPS54325_10 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:4.5-V to 18-V, 3-A OUTPUT SYNCHRONOUS STEP DOWN SWITCHER WITH INTEGRATED FET (SWIFT?) |
| TPS54325EVM | 功能描述:電源管理IC開發工具 5-17V Input 3A SWIFT CVTR Eval RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
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