TPS40322_16 Datasheet, PDF (1/47 Pages) Texas Instruments – Dual Output or Two-Phase Synchronous Buck Controller

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TPS40322
SLUSAF8E – JULY 2011 – REVISED JANUARY 2016
TPS40322 Dual Output or Two-Phase Synchronous Buck Controller
1 Features
•1 Dual-Output or Two-Phase Synchronous Buck
Controller
• 180° Out-of-Phase Reduces Input Ripple
• Input Voltage Range: 3 V to 20 V
• Output Voltage Range: 0.6 V to 5.6 V
• Adjustable Frequency: 100 kHz to 1 MHz
• Bidirectional SYNC Pin With 0°/180° or 90°/270°
Phase Shift
• Voltage Mode Control With Input Feedforward
• Accurate Current Sharing for Two-Phase
Operation
• Individual Power Good 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
• Individual Overcurrent Limit Setting
• Hiccup Overcurrent Protection
• Accurate Inductor DCR or Resistive Current
Sensing
• Remote Sense for Two-Phase Applications
• Internal N-Channel FET Drivers
• Integrated Bootstrap Switches
• Available in 5-mm × 5-mm 32-Pin VQFN Package
3 Description
The TPS40322 device is a dual-output, synchronous
buck 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. Bidirectional
master and slave synchronization function provides
evenly distributed phase shift for a four-output system
that reduces input ripple further and attenuates the
system noise.
The wide input range can support 3.3-V, 5-V, and
12-V buses. The accurate reference voltage satisfies
the precision voltage needed by 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.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS40322
VQFN (32)
5.00 mm × 5.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Application Circuit
26
VDD
31 UVLO
BP6 20
VIN
3 V to 20 V
2 Applications
• Multiple Rail Systems
• Telecom Base Station
• Switcher and Router Networking
• xDSL Broadband Access
• Server and Storage System
VOUT1
24 HDRV1
25 BOOT1
23 SW1
HDRV2 16
BOOT2 15
SW2 17
22 LDRV1
21 PGND1
30 ILIM1
LDRV2 18
PGND2 19
ILIM2 11
28 CS1+
CS2+ 13
TPS40322
29 CS1–
CS2– 12
27 PG1
PG2 14
4 FB1
FB2 8
9 DIFFO
COMP2 7
5 COMP1
SYNC 1
2 RT
PHSET 32
EN/SS1 AGND EN/SS2
3
6
10
VOUT2
UDG-10215
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.