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參數(shù)資料
| 型號(hào)： | TPS56300PWP |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2 A DUAL SWITCHING CONTROLLER, 400 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封裝： | GREEN, PLASTIC, HTSSOP-28 |
| 文件頁數(shù)： | 8/39頁 |
| 文件大小： | 1063K |
| 代理商： | TPS56300PWP |
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TPS56300
DUALOUTPUT LOW INPUT VOLTAGE
DSP POWER SUPPLY CONTROLLER WITH SEQUENCING
SLVS261B DECEMBER 1999 SEPTEMBER 2000
16
www.ti.com
detailed description (continued)
synchronous charge pump
The regulated synchronous charge pump provides drive voltage to the low-side driver at VDRV (5V), and to the
high-side driver when the high-side driver is configured as a floating driver. The minimum drive voltage is 4.5V, (typical
5V). The minimum short circuit current is 80 mA. The bootstrap capacitor is used to provide Vdrive for the high-side
FET, the power for VLDODRV, and the bias regulator. Instead of diodes, synchronous rectified MOSFETs are used
to reduce voltage drop losses and allow a lower input voltage threshold. The charge pump oscillator operates at 300
kHz until the UVLO VDRV is set; after which it is synchronized to the converter switching frequency and is turned on
and off to regulate VDRV at 5 V.
The charge pump is designed to operate at a switching frequency of 200 kHz to 400 kHz. Operation at low frequency
may require larger capacitors on CPC and VDRV pin. High frequency (> 400 kHz) may not be possible.
power sequence
The VOUTLDO voltage is powered up with respect to the same slowstart reference voltage as the VOUTRR. Also,
at power down, the VOUTRR and VOUTLDO are discharged to ground through P-channel MOSFETs in series with
1-k
resistors.
TYPICAL CHARACTERISTICS
Figure 1
10
11
12
13
0
25
50
75
100
125
Quiescent
Current
mA
QUIESCENT CURRENT
vs
JUNCTION TEMPERATURE
TJ Junction Temperature °C
VCC = 3.3 V
Inhibit = 0 V
Figure 2
150
155
160
165
170
175
180
0
25
50
75
100
125
VCC UVLO HYSTERESIS
vs
JUNCTION TEMPERATURE
TJ Junction Temperature °C
UVLO
Hysteresis
mV
V
CC
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| TPS56300PWPG4 | 功能描述:DC/DC 開關(guān)控制器 Dual Output Low Input Vltg Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| TPS56300PWPR | 功能描述:DC/DC 開關(guān)控制器 Dual Output Low Input Vltg Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| TPS56300PWPRG4 | 功能描述:DC/DC 開關(guān)控制器 Dual Output Low Input Vltg Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| TPS56302EVM-163 | 功能描述:電源管理IC開發(fā)工具 High Perf Lo Input Vltg 2-Ch Buck Reg RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS56302PWP | 功能描述:DC/DC 開關(guān)控制器 Dual Output Low Input Vltg Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
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