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The DB1230 is a high frequency synchronous 
rectified step-down regulator which integrates an 
110m

Ω high-side power MOSFET and an 85mΩ 

low-side power MOSFET.   

It provides easy & compact solution to implement 
3A continuous output current over a wide range 
input from 4.5V to 16V with a good load and line 
regulation. 

The current-mode control operation provides a 
good loop-stability under any system condition 
and fast transient response. 

According to an internal compensation and a high 
frequency operation, the DB1230 requires a few 
number of external components mentioned in the 
basic dc-dc power system. 

The built-in protections are allowed to have a 
simple design and a robust operation. 

For a good thermal performance, the DB1230 
uses an internal temperature independent voltage 
reference and the package that has low ɂ

JA

 

(<50°C/W) 

It is available in 8-pin SOP-EP or 14-pin TSSOP 
package with an exposed pad. 

„

 4.5V to 16V operating input range.

„

High-side 110 m

Ω, low-side 85 mΩ

Built-in power MOSFETs.

„

Fixed PWM 700kHz switching frequency.

„

Output voltage accuracy :  • 2%

„

3A continuous output current.

„

Low reference voltage : 0.8V

„

Programmable soft-start.

„

Internal Compensation.

„

Built-in SCP, OCP, TSD Protection.

„

Thermally Enhanced 8-SOP-EP Package

„

 Digital Set Top Boxes.

„

Personal Video Recorder.

„

Flat Panel TV & Monitor.

„

Distributed Power Systems.

DB1230HETR

8-SOP-EP

DB1230HPTR

14-TSSOP-EP

Fig.1 Normal application circuit      

   Fig.2 Efficiency (Vout=3.3V) 

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1 EN 

Enable pin. 
For automatic start-up, please leave it open and in case of on/off control, there 
should be pull-down resistor.(10K~100Kohm) 

2 FB 

Feedback pin.   
External resistors are connected between OUT and GND to set the regulated 
output voltage based on 0.8V reference. 

3 VCC 

Internal regulated output. 
A decoupling capacitor should be close to this pin as possible 

4 SS 

External soft-start program pin.   
An external capacitor should be connected to GND. 

5 GND 

Ground. 

6 SW 

Switching Node.   
An inductor, internal high-side and low-side power switches are connected 

7 BS 

Bootstrap pin.   
The bootstrap charge capacitor should be connected between BS and SW to 
provide a supply to gate driver of high-side power switch. 

8 

IN 

Input power supply pin. 

EP Exposed 

Pad

Exposed pad. Connect the exposed pad to GND for heat sink. 
This pin combines thermal sink and power ground. 

G

 

Fig.3 DB1230 PIN configuration 

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The DB1510B low-dropout linear regulator 
operates from input voltages as low as 2.2V and 
are able to deliver up to 1A of continuous output 
currentGthe DB1510B offers low dropout (typically 
800mV at 1A) and low quiescent current (typically 
400uA at 0.1A). 

Fixed output voltages of the DB1510B are 1.0V, 
1.2V, 1.5V, 1.8V, 2.5V, 2.8V, 3.3V & 3.5V and the 
output voltage is 2% accurate over load and line 
variations. These regulators use small 2.2

μF 

MLCC input capacitor and 4.7

μF MLCC output 

capacitors to deliver 1A output current.   

Soft-start reduces inrush current. The other 
features include over current protection (OCP), 
short-circuit protection (SCP), and thermal shut 
down protection (TSD). 

The DB1510B is packaged SOT-223, TO-252 & 
8-pin thin dual flat no lead (TDFN) package that a 
heat sink or an exposed pad for optimal power 
dissipation. 

„  Input Voltage Range: 2.2V to 6.0V 
„  Quiescent Current: Typ. 400uA 
„  Current limit : Min. 1.2A 
„  Dropout Voltage: Typ. 800mV @ 1A 
„  Compatible with MLCC Capacitors 
„  Soft-Start Limits Inrush CurrentG
„  Thermal Shutdown Protection 
„  Over Current & Short Circuit Protection 

„ Servers 
„ Storage 
„ Networking 
„ Optical 

Modules 

„ Post 

Regulators 

„ Notebooks 
„ PDA 

DB1510BT3TRxx

 TO-252 

(I) 

DB1510BT32TRxx

 TO-252 

(II) 

DB1510BNNTRxx

 SOT-223 

(I) 

DB1510BNN2TRxx

 SOT-223 

(II) 

DB1510BDLTRxx

 8-TDFN 

(3x3) 

 

G

8-TDFN (3x3) Application CircuitG

G

Protection 

Protection 

odules 

odules 

egulators 

gulators 

books 

ooks 

DA 

A 

DB151

B1

DB

DB

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1 3 1 

VIN 

Input 

Voltage 

2, TAB 

1 

3 

GND 

Ground 

3 

2, TAB 

5, 6 

OUT 

Output Voltage 

- 

- 

2, 4, 7, 8 

NC 

No Connection 

G G G G G G

G G G G G

G

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