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TPS40322_16

更新时间： 2024-11-06 02:58:31
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德州仪器 - TI /
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40页 1022K
描述
Dual Output or Two-Phase Synchronous Buck Controller

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TPS40322_16 数据手册

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TPS40322  
www.ti.com  
SLUSAF8 –JUNE 2011  
Dual Output or Two-Phase Synchronous Buck Controller  
1
FEATURES  
DESCRIPTION  
The TPS40322 is a dual-output, synchronous buck  
•
Dual- or Multi-phase Synchronous Buck  
Controller  
controller. It can also be configured as  
a
single-output, two-phase controller. The 180°  
out-of-phase operation reduces the input current  
ripple and extends the input capacitor lifetime.  
Bi-directional master/slave synchronization function  
•
•
•
•
•
180° Out-of-Phase Reduces Input Ripple  
Input Voltage Range from 3 V to 20 V  
Output Voltage Range: 0.6 V to 5.6 V  
Adjustable Frequency 100 kHz to 1 MHz  
Bidirectional SYNC with 0°/180° or 90°/270°  
Phase Shift  
provides evenly distributed phase shift for  
a
four-output system that reduces input ripple further  
and attenuates the system noise.  
•
•
Voltage Mode Control With Input Feed-forward  
Accurate Current Sharing for Multi-phase  
Operation  
Individual PowerGood Outputs  
Individual Enable and Programmable Soft  
Start, With Pre-bias Start-up  
±0.5%, 600-mV Reference  
Output UV/OV Protection and Input  
Undervoltage Lockout  
The wide input range can support 3.3-V, 5-V, and  
12-V buses. The accurate reference voltage satisfies  
the precision voltage need of the modern ASICs and  
potentially  
reduces  
the  
output  
capacitance  
•
•
requirement. Separate PGOOD signals provide  
flexibility for system monitoring and sequencing. The  
two channels are independently controlled and each  
soft-start time is programmable. Voltage mode control  
is implemented to reduce noise sensitivity and also  
ensures low duty ratio conversion.  
•
•
•
•
•
Individual Overcurrent Limit Setting  
Hiccup Overcurrent Protection  
Accurate Inductor DCR or Resistive Current  
Sensing  
.
SIMPLIFIED APPLICATION CIRCUIT  
26  
VIN  
3 V  
to  
•
•
•
•
Remote Sense for Multi-phase Applications  
Internal N-Channel FET Drivers  
Integrated Bootstrap Switches  
VDD  
BP6 20  
31 UVLO  
20 V  
Available in 5 mm × 5 mm 32-Pin QFN Package  
24 HDRV1  
25 BOOT1  
23 SW1  
HDRV2 16  
BOOT2 15  
SW2 17  
APPLICATIONS  
•
•
•
•
•
Multiple Rail Systems  
Telecom Base Station  
Switcher/Router Networking  
xDSL Broadband Access  
Server and Storage System  
22 LDRV1  
21 PGND1  
30 ILIM1  
LDRV2 18  
PGND2 19  
ILIM2 11  
28 CS1+  
CS2+ 13  
VOUT2  
TPS40322  
VOUT1  
CS2– 12  
PG2 14  
29 CS1–  
27 PG1  
4
9
FB1  
FB2  
COMP2  
SYNC  
8
7
1
DIFFO  
5
2
COMP1  
RT  
PHSET 32  
EN/SS1 AGND EN/SS2  
10  
3
6
UDG-10215  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas  
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2011, Texas Instruments Incorporated  
1234567...40

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