DatasheetsPDF.com

DC Converter. HT7466 Datasheet

DatasheetsPDF.com

DC Converter. HT7466 Datasheet






HT7466 Converter. Datasheet pdf. Equivalent




HT7466 Converter. Datasheet pdf. Equivalent





Part

HT7466

Description

3A Step-Down DC to DC Converter



Feature


www.DataSheet.co.kr HT7466 3A Step-Down DC to DC Converter Feature • Input voltage range: 4.75V to 24V • Variab le output voltage range: 1.222V to 20V • 3A output current • Efficiency up to 91% • Fixed 380kHz operating f requency • 20mA shutdown current • Internal power MOSFET switch • Sta ble operation using low ESR ceramic cap acitors • Over temperature protec.
Manufacture

Holtek Semiconductor

Datasheet
Download HT7466 Datasheet


Holtek Semiconductor HT7466

HT7466; tion • Cycle-by-cycle over current pr otection • Soft-start function • Under voltage lockout protection • 8 -pin SOP package General Description T he HT7466 is a DC-DC buck regulator. Th e builtin high driver NMOS provides a m onolithic solution for high efficiency step-down DC-DC converter. With 3A outp ut current, the wide input voltage rang e and stable output voltag.


Holtek Semiconductor HT7466

e regulation can widely use in all kinds of application, like communication, po wer for high power LED, battery charger , etc. The protection function include over current and over temperature prote ction. The soft start function prevent inrush supply current and output oversh oot when initial startup. The under vol tage lockout is set to 4.1V. It prevent s abnormal situati.


Holtek Semiconductor HT7466

on occurring. The HT7466 requires a mini mum number of standard external compone nts and is available in a 8-pin SOP pac kage for small area PCB application. A pplications • Battery chargers • Distributed power systems • LED powe r supplies • DSL modems • Linear regulator pre power processing • Set -Top-Boxes, DVD players, LCD displays Application Circuit VIN 4.75~2.

Part

HT7466

Description

3A Step-Down DC to DC Converter



Feature


www.DataSheet.co.kr HT7466 3A Step-Down DC to DC Converter Feature • Input voltage range: 4.75V to 24V • Variab le output voltage range: 1.222V to 20V • 3A output current • Efficiency up to 91% • Fixed 380kHz operating f requency • 20mA shutdown current • Internal power MOSFET switch • Sta ble operation using low ESR ceramic cap acitors • Over temperature protec.
Manufacture

Holtek Semiconductor

Datasheet
Download HT7466 Datasheet




 HT7466
www.DataSheet.co.kr
HT7466
3A Step-Down DC to DC Converter
Feature
• Input voltage range: 4.75V to 24V
• Variable output voltage range: 1.222V to 20V
• 3A output current
• Efficiency up to 91%
• Fixed 380kHz operating frequency
• 20mA shutdown current
• Internal power MOSFET switch
• Stable operation using low ESR ceramic capacitors
• Over temperature protection
• Cycle-by-cycle over current protection
• Soft-start function
• Under voltage lockout protection
• 8-pin SOP package
Applications
• Battery chargers
• Distributed power systems
• LED power supplies
• DSL modems
• Linear regulator pre power processing
• Set-Top-Boxes, DVD players, LCD displays
General Description
The HT7466 is a DC-DC buck regulator. The built-
in high driver NMOS provides a monolithic solution
for high efficiency step-down DC-DC converter. With
3A output current, the wide input voltage range and
stable output voltage regulation can widely use in all
kinds of application, like communication, power for
high power LED, battery charger, etc. The protection
function include over current and over temperature
protection. The soft start function prevent inrush
supply current and output overshoot when initial
startup. The under voltage lockout is set to 4.1V. It
prevents abnormal situation occurring.
The HT7466 requires a minimum number of standard
external components and is available in a 8-pin SOP
package for small area PCB application.
Application Circuit
VIN
4.75~24V
10uF
C1
10nF
C2
VIN BS
EN SW
HT7466
SS
GND
FB
COMP
10nF
C3
R3
C5
C4
Efficiency vs Output Current
VOUT
=
VFB
×

R1 + R
R2
2

L VOUT
B330A
R1
R2 22uF
C6
Rev. 1.00
1 September 02, 2011
Datasheet pdf - http://www.DataSheet4U.net/




 HT7466
www.DataSheet.co.kr
Block Diagram
HT7466
Pin Assignment
SS 1
BS 2
V IN 3
SW 4
8 EN
7 COM P
6 FB
5 GND
H T7466
8 S O P -A
Pin Description
Pin No. Pin Name
Description
Soft-start input.
1 SS If the soft start function is to be used then an external capacitor should be connected between
this pin and ground. If the soft start function is not required the pin should be left open.
Internal power NMOS gate drive boost input.
2 BS A 10nF or greater value capacitor should be connected from SW to BS for additional Power
NMOS gate driving purposes.
Power supply input.
3 VIN The input supply pin for the device, VIN, is connected to a supply voltage between 4.75V to
24V.
4
SW
Power switching output.
The internal power MOS drain is connected to the inductor, diode and VIN.
5
GND
Ground.
Device ground voltage reference.
6
FB
Feedback pin.
The feedback pin is connected to an external resistor divider to measure the output voltage.
Error amplifier output.
7 COMP Used for compensation of the regulation control loop. Connect a series RC network from
COMP to GND to compensate the regulation control loop. The COMP pin value is 1.222V.
Enable input.
8 EN This pin is set high to turn on the regulator and low to turn it off. The pin should be left
unconnected if not used.
Rev. 1.00
2 September 02, 2011
Datasheet pdf - http://www.DataSheet4U.net/




 HT7466
www.DataSheet.co.kr
HT7466
Absolute Maximum Ratings
Maximum Input Supply Voltage.............................26V
Switch Node Voltage..............................................26V
Feedback Voltage......................................................6V
EN Voltage................................................................6V
Comp Voltage...........................................................6V
SS Voltage.................................................................6V
Maximum Junction Temperature........................ 150°C
Note: These are stress ratings only. Stresses exceeding the range specified under “Absolute Maximum Ratings”
may cause substantial damage to the device. Functional operation of this device at other conditions beyond
those listed in the specification is not implied and prolonged exposure to extreme conditions may affect
device reliability.
Recommended Operating Conditions
Input Supply Voltage................................4.75V ~ 24V
Ambient Temperature Range................ -40°C ~ +85°C
Electrical Characteristics
VIN=12V, Ta=25°C, unless otherwise specified refer to circuit of Figure 1. ( note 1)
Symbol
Parameter
Test Condition
Min.
Typ. Max. Unit
VFB Feedback Voltage
4.75V ≤ VIN ≤ 24V 1.194 1.222 1.250
V
VUVLO Under Voltage Lockout Threshold
— — 4.1 — V
— Under Voltage Lockout Threshold Hysteresis
— 200 — mV
IQ
ISS
FOSC
DMAX
ISW
RDS
Quiescent Current
Shutdown Supply Current
Oscillator Frequency
Short Circuit Frequency
Maximum Duty Cycle
Upper Switch Leakage
Switch On Resistance (note 2)
VFB=1.5V, VEN=High
1.0 1.2 mA
VEN=0V
— 20 30 mA
— — 380 — kHz
VFB=0V
VFB=1.0V
VEN=0V, VSW=0V
IOUT=3A
20 35 50 kHz
— 90 — %
— 0 10 mA
— 95 — mW
ILIMIT
Current Limit
— — 4.3 — A
Error Amplifier Voltage Gain (note 2)
— — 70 — dB
Error Amplifier Trans-conductance (note 2)
— 800 — mA/V
VEN Enable Threshold
TJ Thermal Shutdown
4.75V ≤ VIN ≤ 24V
0.9
1.0
1.5
V
— — 150 — °C
Note: 1. Specifications are production tested at Ta=room temperature. Specifications over the -40°C to 85°C
operating temperature range are assured by design, characterization and correlation with Statistical
Quality Controls (SQC).
2. Designer test specifications.
Rev. 1.00
3 September 02, 2011
Datasheet pdf - http://www.DataSheet4U.net/






Recommended third-party HT7466 Datasheet






@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)