Step-Down Converter. RT6361 Datasheet


RT6361 Converter. Datasheet pdf. Equivalent


Part Number

RT6361

Description

Asynchronous Step-Down Converter

Manufacture

Richtek

Total Page 30 Pages
Datasheet
Download RT6361 Datasheet


RT6361
®
RT6361
60VIN, 1.5A, Asynchronous Step-Down Converter with Low
Quiescent Current
General Description
The RT6361 is a 1.5A, high-efficiency, peak current mode
control asynchronous step-down converter. The device
operates with input voltages from 4V to 60V. The device
can program the output voltage between 0.8V to VIN. The
low quiescent current design with the integrated low RDS(ON)
of high-side MOSFET achieves high efficiency over the
wide load range. The peak current mode control with simple
external compensation allows the use of small inductors
and results in fast transient response and good loop
stability.
The wide switching frequency of 100kHz to 2500kHz allows
for efficiency and size optimization when selecting the
output filter components. The ultra-low minimum on-time
enables constant-frequency operation even at very high
step-down ratios. For switching noise sensitive
applications, it can be externally synchronized from
300kHz to 2200kHz.
The RT6361 provides complete protection functions such
as input under-voltage lockout, output under-voltage
protection, output over-voltage protection, over-current
protection, and thermal shutdown. Cycle-by-cycle current
limit provides protection against shorted outputs, and soft-
start eliminates input current surge during start-up. The
RT6361 is available in WDFN-10SL 3x3 and SOP-8
(Exposed pad) packages.
Features
Wide Input Voltage Range
4.5V to 60V
4V to 60V (Soft-start is finished)
Wide Output Voltage Range : 0.8V to VIN
0.8V ±1.5% Reference Accuracy
Peak Current Mode Control
Integrated 160mΩ High-Side MOSFET
Low Quiescent Current : 90μA
Low Shutdown Current : 1.3μA
Adjustable Switching : 100kHz to 2.5MHz
Synchronizable Switching : 300kHz to 2.2MHz
Power Saving Mode (PSM) at Light Load
Low Dropout at Light Loads with Integrated Boot
Recharge FET
Externally Adjustable Soft-Start by Part Number
Option
Power Good Indication by Part Number Option
Enable Control
Adjustable UVLO Voltage and Hysteresis
Built-In UVLO, UVP, OVP, OCP, OTP
Applications
12V, 24V and 48V Power Systems
GPS, Entertainment
Simplified Application Circuit
VIN
Enable Signal
PGOOD
RT6361GQW
VIN BOOT
CIN SW
RRT
CCOMP1
RCOMP
CCOMP2
EN
PGOOD
RT/SYNC
FB
COMP
SS/TR
GND PAD
CBOOT
L1
D1 RFB1
RFB2
CSS
VOUT
VIN
COUT
Enable Signal
RT6361GSP
VIN BOOT
CIN SW
CCOMP1 RCOMP
CCOMP2
EN FB
COMP
RT/SYNC
GND PAD
CBOOT
L1
D1 RFB1
RFB2
RRT
VOUT
COUT
Copyright ©2019 Richtek Technology Corporation. All rights reserved.
DS6361-01 September 2019
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1

RT6361
RT6361
Ordering Information
RT6361
Pin 1 Orientation***
(2) : Quadrant 2, Follow EIA-481-D
(WDFN-10SL 3x3 only)
Package Type
SP : SOP-8 (Exposed Pad-Option 2)
QW : WDFN-10SL 3x3 (W-Type)
Pin Configuration
(TOP VIEW)
BOOT
VIN
EN
RT/SYNC
8
27
PAD
36
9
45
SW
GND
COMP
FB
Lead Plating System
G : Green (Halogen Free and Pb Free)
SOP-8 (Exposed pad)
Note :
***Empty means Pin1 orientation is Quadrant 1
Richtek products are :
RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
BOOT 1
VIN 2
EN 3
SS/TR 4
RT/SYNC 5
10 SW
9 GND
8 COMP
7 FB
11 6 PGOOD
WDFN-10SL 3x3
Marking Information
RT6361GSP
RT6361
GSPYMDNN
RT6361GSP : Product Number
YMDNN : Date Code
RT6361GQW
QA=YM
DNN
QA= : Product Code
YMDNN : Date Code
Copyright ©2019 Richtek Technology Corporation. All rights reserved.
www.richtek.com
2
is a registered trademark of Richtek Technology Corporation.
DS6361-01 September 2019


Features ® RT6361 60VIN, 1.5A, Asynchronous Ste p-Down Converter with Low Quiescent Cur rent General Description The RT6361 is a 1.5A, high-efficiency, peak current mode control asynchronous step-down con verter. The device operates with input voltages from 4V to 60V. The device can program the output voltage between 0.8 V to VIN. The low quiescent current des ign with the integrated low RDS(ON) of high-side MOSFET achieves high efficien cy over the wide load range. The peak c urrent mode control with simple externa l compensation allows the use of small inductors and results in fast transient response and good loop stability. The wide switching frequency of 100kHz to 2 500kHz allows for efficiency and size o ptimization when selecting the output f ilter components. The ultra-low minimum on-time enables constant-frequency ope ration even at very high step-down rati os. For switching noise sensitive appli cations, it can be externally synchroni zed from 300kHz to 2200kHz. The RT6361 provides complete protect.
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