Step-Down Converter. RT7296B Datasheet


RT7296B Converter. Datasheet pdf. Equivalent


Part Number

RT7296B

Description

17V Current Mode Synchronous Step-Down Converter

Manufacture

Richtek

Total Page 14 Pages
Datasheet
Download RT7296B Datasheet


RT7296B
RT7296B
3A, 17V Current Mode Synchronous Step-Down Converter
General Description
The RT7296B is a high-efficiency, 3A current mode
synchronous step-down DC-DC converter with a wide
input voltage range from 4.5V to 17V. The device
integrates 80mhigh-side and 30mlow-side
MOSFETs to achieve high efficiency conversion. The
current mode control architecture supports fast
transient response and internal compensation. A
cycle-by-cycle current limit function provides protection
against shorted output. The RT7296B provides
complete protection functions such as input
under-voltage lockout, output under-voltage protection,
over-current protection, and thermal shutdown. The
PWM frequency is adjustable by the EN/SYNC pin. The
RT7296B is available in the TSOT-23-8 (FC) package.
Ordering Information
RT7296B
Package Type
J8F : TSOT-23-8 (FC)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Features
4.5V to 17V Input Voltage Range
3A Output Current
Internal N-Channel MOSFETs
Current Mode Control
Fixed Switching Frequency : 500kHz
Synchronous to External Clock : 200kHz to 2MHz
Cycle-by-Cycle Current Limit
External Soft-Start Function
Input Under-Voltage Lockout
Output Under-Voltage Protection
Thermal Shutdown
Applications
Industrial and Commercial Low Power Systems
Computer Peripherals
LCD Monitors and TVs
Set-top Boxes
Marking Information
01=DNN
01= : Product Code
DNN : Date Code
Note :
Richtek products are :
RoHS compliant and compatible with the current
requirements of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
Simplified Application Circuit
VIN
Enable
C1
C2
C5
RT7296B
VIN BOOT
C3
SW
EN/SYNC
PVCC
R5
FB
SS GND
L1
R1
R2
VOUT
C4
Copyright © 2018 Richtek Technology Corporation. All rights reserved.
DS7296B-03 May 2018
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1

RT7296B
RT7296B
Pin Configuration
(TOP VIEW)
87 6 5
2 34
TSOT-23-8 (FC)
Functional Pin Description
Pin No.
Pin Name
Pin Function
1 SS
2 VIN
Soft-start control input. SS control the soft-start period. Connect a capacitor
from SS to GND to set the soft-start period.
Power input. Support 4.5V to17V Input Voltage. Must bypass with a ceramic
capacitor at this pin.
3 SW
Switch node. Connect to external L-C filter.
4 GND
System ground.
5 BOOT
Bootstrap supply for high-side gate driver. Connect a 0.1F ceramic capacitor
between the BOOT and SW pins.
Enable control input. High = Enable. Apply an external clock to adjust the
6
EN/SYNC
switching frequency. If using pull high resistor connected to VIN, the
recommended value range is 60kto 300k.
7 PVCC
5V bias supply output. Connect a minimum of 0.1F capacitor to ground.
8 FB
Feedback voltage input. The pin is used to set the output voltage of the
converter to regulate to the desired voltage via a resistive divider. Feedback
reference = 0.807V.
Copyright © 2018 Richtek Technology Corporation. All rights reserved.
www.richtek.com
2
is a registered trademark of Richtek Technology Corporation.
DS7296B-03 May 2018


Features RT7296B 3A, 17V Current Mode Synchronou s Step-Down Converter General Descript ion The RT7296B is a high-efficiency, 3 A current mode synchronous step-down DC -DC converter with a wide input voltage range from 4.5V to 17V. The device int egrates 80m high-side and 30m low -side MOSFETs to achieve high efficienc y conversion. The current mode control architecture supports fast transient re sponse and internal compensation. A cyc le-by-cycle current limit function prov ides protection against shorted output. The RT7296B provides complete protecti on functions such as input under-voltag e lockout, output under-voltage protect ion, over-current protection, and therm al shutdown. The PWM frequency is adjus table by the EN/SYNC pin. The RT7296B i s available in the TSOT-23-8 (FC) packa ge. Ordering Information RT7296B Pac kage Type J8F : TSOT-23-8 (FC) Lead Pla ting System G : Green (Halogen Free and Pb Free) Features  4.5V to 17V Inp ut Voltage Range  3A Output Current  Internal N-Channel MOSFETs  C.
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