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參數(shù)資料
| 型號： | TPS65251RHAR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, PQCC40 |
| 封裝： | 6 X 6 MM, GREEN, PLASTIC, VQFN-40 |
| 文件頁數(shù)： | 26/31頁 |
| 文件大?。?/td> | 1827K |
| 代理商： | TPS65251RHAR |
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SLVSAA4B – JUNE 2010 – REVISED JANUARY 2011
www.ti.com
TERMINAL FUNCTIONS (DCA)
NAME
NO.
I/O
DESCRIPTION
RLIM3
1
I
Current limit setting for Buck 3. Fit a resistor from this pin to ground to set
the peak current limit on the output inductor.
SS3
2
I
Soft start pin for Buck 3. Fit a small ceramic capacitor to this pin to set the
converter soft start time.
COMP3
3
O
Compensation for Buck 3. Fit a series RC circuit to this pin to complete
the compensation circuit of this converter.
FB3
4
I
Feedback input for Buck 3. Connect a divider set to 0.8V from the output
of the converter to ground.
SYNC
5
I
Synchronous clock input. If there is a sync clock in the system, connect to
the pin. When not used connect to GND.
ROSC
6
I
Oscillator set. This resistor sets the frequency of internal autonomous
clock. If external synchronization is used resistor should be fitted and set
to ~70% of external clock frequency.
FB1
7
I
Feedback pin for Buck 1. Connect a divider set to 0.8 V from the output of
the converter to ground.
COMP1
8
O
Compensation pin for Buck 1. Fit a series RC circuit to this pin to
complete the compensation circuit of this converter.
SS1
9
I
Soft start pin for Buck 1. Fit a small ceramic capacitor to this pin to set the
converter soft start time.
RLIM1
10
I
Current limit setting pin for Buck 1. Fit a resistor from this pin to ground to
set the peak current limit on the output inductor.
EN1
11
I
Enable pin for Buck 1. A low level signal on this pin disables it. If pin is
left open a weak internal pull-up to V3V will allow for automatic enable.
For a delayed start-up add a small ceramic capacitor from this pin to
ground.
BST1
12
I
Bootstrap capacitor for Buck 1. Fit a 47-nF ceramic capacitor from this pin
to the switching node.
VIN1
13
I
Input supply for Buck 1. Fit a 10-F ceramic capacitor close to this pin.
LX1
14, 15
O
Switching node for Buck 1
LX2
16, 17
O
Switching node for Buck 2
VIN2
18
I
Input supply for Buck 2. Fit a 10-F ceramic capacitor close to this pin.
BST2
19
I
Bootstrap capacitor for Buck 2. Fit a 47-nF ceramic capacitor from this pin
to the switching node.
EN2
20
I
Enable pin for Buck 2. A low level signal on this pin disables it. If pin is
left open a weak internal pull-up to V3V will allow for automatic enable.
For a delayed start-up add a small ceramic capacitor from this pin to
ground.
RLIM2
21
I
Current limit setting for Buck 2. Fit a resistor from this pin to ground to set
the peak current limit on the output inductor.
SS2
22
I
Soft start pin for Buck 2. Fit a small ceramic capacitor to this pin to set the
converter soft start time.
COMP2
23
O
Compensation pin for Buck 2. Fit a series RC circuit to this pin to
complete the compensation circuit of this converter
FB2
24
I
Feedback input for Buck 2. Connect a divider set to 0.8 V from the output
of the converter to ground.
LOW_P
25
I
Low power operation mode(active high) input for TPS65251
GND
26
Ground pin
PGOOD
27
O
Power good. Open drain output asserted after all converters are
sequenced and within regulation. Polarity is factory selectable (active high
default).
V7V
28
O
Internal supply. Connect a 10-F ceramic capacitor from this pin to
ground.
V3V
29
O
Internal supply. Connect a 10-F ceramic capacitor from this pin to
ground.
AGND
30
Analog ground. Connect all GND pins and the power pad together.
GND
31
Ground pin
4
Copyright 2010–2011, Texas Instruments Incorporated
Product Folder Link(s): TPS65251
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| TPS65251RHAT | 功能描述:PMIC 解決方案 PMU with 3 DC/DC Converters RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| TPS65252EVM | 功能描述:電源管理IC開發(fā)工具 TPS65252 Eval Mod 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 |
| TPS65252RHDR | 功能描述:PMIC 解決方案 4.5-16V Inp w/ 2 BUCK CONVERTER RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| TPS65252RHDT | 功能描述:PMIC 解決方案 4.5-16V Inp w/ 2 BUCK CONVERTER RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| TPS65253EVM | 功能描述:電源管理IC開發(fā)工具 TPS65253 Eval Mod 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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