DrMOSProductFamily
DrMOS5x5
TDA21231
DataSheet
Rev.2.0
Final
PowerManagementandMultimarket
TDA21231
1
Applications
Desktop and Server VR buck-converter
Single Phase and Multiphase POL
CPU/GPU Regulation in Notebook, Desktop Graphics Cards, DDR Memory, Graphic Memory
High Power Density Voltage Regulator Modules (VRM)
2
Features
For synchronous buck converter step down voltage applications
Maximum average current of 55 A
Input voltage range +4.5 V to +16 V
Power MOSFETs rated 25 V
Fast switching technology for improved performance at high switching frequencies (> 500 kHz)
Remote driver disable function
Includes bootstrap diode
Undervoltage lockout
Shoot through protection
+5 V high side and low side MOSFETs driving voltage
Compatible to standard +3.3 V PWM controller integrated circuits
Tri-state PWM input functionality
Small package: PG-IQFN-31-2 (5 x 5 x 0.8 mm³)
RoHS compliant
Thermal warning
Table 1
Part Number
TDA21231
Product Identification
Temp Range
-25 to 125C
Package
PG-IQFN-31-2 (5 x 5 x 0.8 mm³)
Marking
DA21231
Figure 1
Picture of the Product
Data Sheet
1
TDA21231
3
3.1
Description
Pinout
Figure 2
Pinout, Numbering and Name of Pins (transparent top view)
Data Sheet
2
TDA21231
Table 2
Pin No.
1
5
6
7
16
–
23
27
30
I/O Signals
Name
PWM
BOOT
GH
PHASE
SW
GL
PHFLT#
Pin Type Buffer Type Function
I
I
O
I
O
O
O
+3.3 V logic
Analog
Analog
Analog
Analog
Analog
+3.3 V logic
PWM drive logic input
The tri-state PWM input is compatible with 3.3 V.
Bootstrap voltage pin
Connect to BOOT capacitor
High-Side Gate
Test point for High Side MOSFET gate signal
Switch node
(reference for Boot voltage)
internally connected to SW pin, connect to BOOT capacitor
Switch node output
High current output switching node
Low-Side Gate
Test point for Low Side MOSFET gate signal
Thermal Warning
Connect through a resistor to 3.3V. When the thermal protection
threshold is tripped, the PHFLT# pin is being pulled low. Leave
open if not used.
Enable signal (active high)
Connect to GND to disable the IC.
31
EN
I
+3.3 V logic
Table 3
Pin No.
Power Supply
Name
VIN
PVCC
VCC
Pin Type Function
POWER
POWER
POWER
Input voltage
Supply of the drain of the high-side MOSFET
FET gate supply voltage
High- and low-side gate drive supply
Logic supply voltage
Bias voltage for the internal logic
8 to 11, Vin pad
29
3
Table 4
Pin No.
4
Ground Pins
Name
AGND
PGND
Pin Type Function
GND
GND
Control signal ground
Should be connected to PGND externally
Power ground
All these pins must be connected to the power GND plane through
multiple low inductance vias.
12
–
15, 28,
PGND pads
Table 5
Pin No.
2
24, 25, 26
Not Connected
Name
NC
NC
Pin Type Function
–
–
No internal connection
Leave pin floating or tie to noise-free
voltage of 0 (GND) … 7 V.
No internal connection
Options: Leave floating, tie to GND or SW
Data Sheet
3
TDA21231
3.2
General Description
The Infineon TDA21231
is a multichip module that incorporates Infineon’s premier MOSFET
technology for a
single high-side and a single low-side MOSFET coupled with a robust, high performance, high switching
frequency gate driver in a single PG-IQFN-31-2 package. The optimized gate timing allows for significant light
load efficiency improvements over discrete solutions.
When combined with Infineon’s
family of digital multi-phase controllers, the TDA21231 forms a complete core-
voltage regulator solution for advanced micro and graphics processors as well as point-of-load applications.
Figure 3
Simplified Block Diagram
Data Sheet
4
嵌入式系统
