TMI and SUNTO are the brands of TOLL microelectronic www.toll-semi.com
TMI3252/S/T V2.0 2022.01 1
TMI3252/S/T
600kHz 18V 2A Synchronous COT Step-Down Converter
Features
⚫ 140mΩ/70mΩ Low R
DS(ON)
internal FETs
⚫ High Efficiency Synchronous-Mode
Operation
⚫ Wide Input Range:4.5V to 18V
⚫ Output Voltage from
0.8V(TMI3252)
0.6V(TMI3252S)
0.765V(TMI3252T)
⚫ 600kHz Switch Frequency
⚫ Up to 2A Output Current
⚫ COT control to achieve fast transient
responses
⚫ Power Save Mode at Light Load
⚫ Integrated internal compensation
⚫ Stable with Low ESR Ceramic Output
Capacitors
⚫ Over Current Protection with Hiccup Mode
⚫ Thermal Shutdown
⚫ Inrush Current Limit and Soft Start
⚫ Build in Input Over Voltage Protection
⚫ Available in SOT23-6 Package
Description
The TMI3252/S/T is a high efficiency 600kHz,
Constant on-Time (COT) control mode synchronous
step-down DC-DC converter capable of delivering
up to 2A current. TMI3252/S/T integrates main
switch and synchronous switch with very low R
DS(ON)
to minimize the conduction loss. Low output voltage
ripple and small external inductor and capacitor size
are achieved with 600kHz switching frequency. It
adopts the COT architecture to achieve fast transient
responses for high voltage step down applications.
The TMI3252 requires a minimum number of readily
available standard external components and is
available in a 6-pin SOT23-6 ROHS compliant
package.
Application
⚫ Digital Set Top Boxes
⚫ Flat Panel Television and Monitors
⚫ Notebook computer
⚫ Wireless and DSL Modems
Typical Application
VIN
EN
GND
LX
FB
VOUT= 3.3V
R1
R2
22µF
22µF
L
BS
100nF
CIN1 CIN2
CO1
100kΩ
R3
C
fb
4.7µH
39kΩ
12.5kΩ
20pF~
100pF
C4
0.1µF
TMI3252 Typical Application Circuits (V
REF
=0.8V)
Efficiency
V
OUT
=3.3V, I
OUT
=0.01A to 2A, T
A
=25°C
60%
65%
70%
75%
80%
85%
90%
95%
100%
0.01 0.1 1 10
Efficiency
Output Current (A)
9V-3.3V
12V-3.3V
16V-3.3V
2 TMI3252/S/T V2.0 2022.01
www.toll-semi.com TMI and SUNTO are the brands of TOLL microelectronic
TMI3252/S/T
Absolute Maximum Ratings
(Note 1)
Parameter
Min
Max
Unit
Input Supply Voltage, EN
-0.3
20
V
LX Voltages
-0.3
20
V
LX Voltages (<10ns transient)
-5.0
22
V
FB Voltage
-0.3
6
V
BS Voltage
-0.3
23
V
Storage Temperature Range
-65
150
°C
Junction Temperature
(Note2)
150
°C
Power Dissipation
1000
mW
Lead Temperature (Soldering, 10s)
260
°C
Package
BSGND
EN
LX
FB
1
2
3
6
4
5
IN
BS
GND
EN
LX
FB
1
2
3
6
4
5
IN
SOT23-6
Top Marking: TP2XXX / TT2XXX
TP2/TT2: Device Code
XXX: Inside Code
SOT23-6
Top Marking: TS2XXX
TS2: Device Code
XXX: Inside Code
Order Information
Part Number
Package
Top Marking
Quantity/Reel
TMI3252
SOT23-6
TP2XXX
3000
TMI3252S
SOT23-6
TS2XXX
3000
TMI3252T
SOT23-6
TT2XXX
3000
TMI3252/TMI3252S/TMI3252T devices are Pb-free and RoHS compliant.