RT9074-33GSP
Evaluation Board
your power partner.
60V, 30µA IQ, Low Dropout Voltage Linear Regulator
Purpose
The RT9074 is a high input-voltage linear regulator specifically designed to minimize external components. The
input voltage range is from 4.5V to 60V. The device supplies 100mA of output current with a maximum dropout
voltage of 300mV. This document explains the function and use of the RT9074-33GSP evaluation board (EVB) and
provides information to enable operation and modification of the evaluation board and circuit to suit individual
requirements.
Table of Contents
Purpose ................................................................................................................................................................. 1
Introduction............................................................................................................................................................ 2
Key Performance Summary Table .......................................................................................................................... 2
Bench Test Setup Conditions ................................................................................................................................. 3
Schematic, Bill of Materials & Board Layout ........................................................................................................... 4
More Information.................................................................................................................................................... 6
Important Notice for Richtek Evaluation Board ....................................................................................................... 6
EVB_RT9074-33GSP-00
October 2015
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RT9074-33GSP
Evaluation Board
your power partner.
Introduction
General Product Information
The RT9074 is a high input-voltage linear regulator specifically designed to minimize external components. The
input voltage range is from 4.5V to 60V. The device supplies 100mA of output current with a maximum dropout
voltage of 300mV. Its 30μA quiescent and 5μA shutdown currents make it ideal for use in battery-powered
applications.
Product Feature
Wide Input Voltage Range : 4.5V to 60V
Low Quiescent Current : 30µA
Low Dropout Voltage : 300mV maximum at 100mA
±3% Output Tolerance Over Line and Load
Stable with 1μF Output Capacitor (Aluminum, Tantalum or Ceramic)
Inherent Reverse-Current Protection (No diode needed)
-60V Reverse-Battery Protection
Key Performance Summary Table
Key Features
Evaluation Board Number : PCB030_V1
Default Input Voltage
5V
Max Output Current
100mA
Default Output Voltage
3.3V
Default Marking & Package Type
RT9074-33GSP, SOP-8 (Exposed Pad)
Other Key Features
4.5V to 60V Input Voltage Range
Low Dropout Voltage : 300mV maximum at 100mA
±3% Output Tolerance Over Line and Load
Inherent Reverse-Current Protection (No diode needed)
-60V Reverse-Battery Protection
Protection
Current Limit
Thermal Shutdown
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October 2015
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RT9074-33GSP
Evaluation Board
your power partner.
Bench Test Setup Conditions
Headers Description and Placement
Please carefully inspect the EVB IC and external components, comparing them to the following Bill of Materials, to ensure that all components are
installed and undamaged. If any components are missing or damaged during transportation, please contact the distributor or send e-mail to
evb_service@richtek.com
Test Points
The EVB is provided with the test points and pin names listed in the table below.
Test point/
Pin name
Signal
Comment (expected waveforms or voltage levels on test points)
VIN
Input voltage
Input voltage range = 4.5V to 60V
VOUT
Output voltage
Default output voltage = 3.3V
SHDN
Shutdown Control test point
Shutdown Control Input (Active High). Connect SHDN high to
disable the output voltage and reduce the IC’s quiescent current
to 5μA (typical).
GND
Ground
Ground
SENSE
Output Voltage Sense point
Output Voltage Sense.
FB
Feedback Input test point
Feedback Input. Connect to the center tap of a resistor divider for
setting the output voltage. (Adjustable versions only)
Power-up & Measurement Procedure
1. Connect input power (4.5V < VIN < 60V) and input ground to VIN and GND test pins respectively.
2. Connect positive end and negative terminals of load to VOUT and GND test pins respectively.
3. Connect power (0V ≤ VIN ≤ 60V) and ground to SHDN and GND test pins respectively.
4. Setting SHDN to GND be 0V for enable the RT9074.
5. Verify the output voltage (approximately 3.3V) between VOUT and GND.
6. Connect an external load up to 100mA to the VOUT and GND terminals and verify the output voltage and
current.
EVB_RT9074-33GSP-00
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RT9074-33GSP
Evaluation Board
your power partner.
Schematic, Bill of Materials & Board Layout
EVB Schematic Diagram
Bill of Materials
Reference
Qty
Part Number
Description
Package
Manufacture
U1
1
RT9074-33GSP
LDO
SOP-8
(Exposed Pad)
RICHTEK
C1
1
GRM21AR72A224KAC5L
0.22μF/±10%/100V/X7R
Ceramic Capacitor
0805
Murata
C2
1
GRM31CR71H225KA88L
2.2μF/±10%/50V/X7R
Ceramic Capacitor
1206
Murata
R1, EC1, R2, EC2,
R4, C4
6
Not Installed
0603
R3
1
0Ω, Resistor
0603
R5
1
100kΩ/±1%, Resistor
0603
GP1, GP2, GP3,
GP4
4
VIN, VOUT, GND
Golden Pin
TP1, TP2, TP3
3
SHDN, SENSE, FB
Test Pin
EVB_RT9074-33GSP-00
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RT9074-33GSP
Evaluation Board
your power partner.
PCB Layout
Top View
Bottom View
EVB_RT9074-33GSP-00
October 2015
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RT9074-33GSP
Evaluation Board
your power partner.
More Information
For more information, please find the related datasheet or application notes from Richtek website
http://www.richtek.com.
Important Notice for Richtek Evaluation Board
THIS DOCUMENT IS FOR REFERENCE ONLY, NOTHING CONTAINED IN THIS DOCUMENT SHALL BE CONSTRUED AS RICHTEK’S WARRANTY, EXPRESS
OR IMPLIED, UNDER CONTRACT, TORT OR STATUTORY, WITH RESPECT TO THE PRESENTATION HEREIN. IN NO EVENT SHALL RICHTEK BE LIABLE T O
BUYER OR USER FOR ANY AND ALL DAMAGES INCLUDING WITHOUT LIMITATION TO DIRECT, INDIRECT, SPECIAL, PUNITIVE OR CONSEQUENTIAL
DAMAGES.
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