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TPS65320D-Q1 PDF预览

TPS65320D-Q1

更新时间： 2023-09-03 20:31:19
品牌 Logo 应用领域
德州仪器 - TI 转换器稳压器
页数 文件大小 规格书
45页 2072K
描述
采用 280mA 自动拉电流 LDO 稳压器的汽车类 3.6V 至 36V、3.2A 降压转换器

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TPS65320D-Q1 数据手册

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Support &  
Community  
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Folder  
Order  
Now  
Tools &  
Software  
Technical  
Documents  
TPS65320D-Q1  
SLVSE56 –NOVEMBER 2017  
TPS65320D-Q1 36-V Step-Down Converter With Eco-mode™ and LDO Regulator  
1 Features  
2 Applications  
1
•
Qualified for Automotive Applications  
•
•
•
Automotive Infotainment and Cluster  
Advanced Driver Assistance System (ADAS)  
Automotive Telematics, eCall  
•
AEC-Q100 Qualified with the Following Results:  
–
Device Temperature Grade 1: –40°C to  
+125°C Ambient Operating Temperature  
3 Description  
–
–
Device HBM ESD Classification Level 2  
Device CDM ESD Classification Level C4B  
The TPS65320D-Q1 device is a combination of a  
high-VIN DC-DC step-down converter, referred to as  
the buck regulator, with an adjustable switch-mode  
frequency from 100-kHz to 2.5-MHz, and a high-VIN  
280-mA low-dropout (LDO) regulator. The input range  
is 3.6 V to 36 V for the buck regulator, and 3 V to  
36 V for the LDO regulator. The buck regulator has  
an integrated high-side MOSFET. The LDO regulator  
features a low-input supply current of 45-μA typical in  
no-load, also has an integrated MOSFET with an  
active-low, push-pull reset output pin. The input  
supply of the LDO regulator auto-source from the  
output of the buck regulator when it is in operation.  
Low-voltage tracking feature enables TPS65320D-Q1  
to track the input supply during cold-crank conditions.  
•
One High-VIN Step-Down DC-DC Converter  
–
–
–
Input Range of 3.6 V to 36 V  
250-mΩ High-Side MOSFET  
Maximum Load Current 3.2 A, Output  
Adjustable 1.1 V to 20 V  
–
Adjustable Switching Frequency 100 kHz to  
2.5 MHz  
–
–
Synchronizes to External Clock  
High Efficiency at Light Loads With Pulse-  
Skipping Eco-mode™ Control Scheme  
–
Maximum 140-µA Operating Quiescent  
Current  
The buck regulator provides a flexible design to fit  
system needs. The external loop compensation circuit  
allows for optimization of the converter response for  
the appropriate operating conditions. A low-ripple  
pulse-skip mode reduces the no-load input-supply  
current to maximum 140 μA.  
•
One Low-Dropout Voltage (LDO) Regulator  
–
Input Range of 3 V to 20 V, With Auto-Source  
to Balance Efficiency and Lower Standby  
Current  
–
280-mA Current Capability With Typical 35-µA  
Quiescent Current in No-Load Condition  
The device has built-in protection features such as  
soft start, current-limit, thermal sensing and shutdown  
due to excessive power dissipation. Furthermore, the  
device has an internal undervoltage-lockout (UVLO)  
function that turns off the device when the supply  
voltage is too low.  
–
–
Power-Good Output (Push-Pull)  
Low-Dropout Voltage of 300 mV at  
IO = 200 mA (Typical)  
•
•
•
Overcurrent Protection for Both Regulators  
Overtemperature Protection  
Device Information(1)  
14-Pin HTSSOP Package With PowerPAD™  
Integrated Circuit Package  
PART NUMBER  
PACKAGE  
BODY SIZE (NOM)  
TPS65320D-Q1  
HTSSOP (14)  
5.00 mm × 4.40 mm  
(1) For all available packages, see the orderable addendum at  
the end of the data sheet.  
Typical Application Schematic  
Buck Efficiency Versus Output Current  
100  
90  
80  
70  
60  
50  
40  
30  
20  
VIN_LDO  
BOOT  
SW  
1.1 V to 20 V,  
3.2 A  
VI = 3.6 V to 36 V  
Supply  
VIN  
5 V  
EN1  
EN2  
LDO Input  
Auto Source  
FB1  
COMP  
RT/CLK  
SS  
1.1 V to 5.5 V,  
280 mA  
LDO_OUT  
fs = 300 kHz  
10  
fs = 2 MHz  
0
GND  
Regulator  
Control  
FB2  
RST  
0
1
2
3
4
Load Current (A)  
PowerPAD  
D001  
TPS65321-Q1  
Copyright © 2017, Texas Instruments Incorporated  
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,  
intellectual property matters and other important disclaimers. PRODUCTION DATA.  
 
 
 
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