RICHTEK RTQ2516GSP-QT Evaluation Board Owner’s Manual
- May 15, 2024
- RICHTEK
Table of Contents
- RTQ2516GSP-QT Evaluation Board
- General Description
- Performance Specification Summary
- Power-up Procedure
- Detailed Description of Hardware
- Bill of Materials
- Typical Applications
- Evaluation Board Layout
- More Information
- Important Notice for Richtek Evaluation Board
- References
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)
RTQ2516GSP-QT Evaluation Board
Owner’s Manual
RTQ2516GSP-QT
Evaluation Board
RTQ2516GSP-QT Evaluation Board
2A, Low Input Voltage, Low Dropout LDO Regulator with Enable
General Description
The Evaluation Board user guide describes the operational use of the
RTQ2516-QT evaluation board as a reference design for demonstration and
evaluation of the RTQ2516-QT, a low input voltage, low dropout LDO regulator
with enable.
Included in this user guide are setup and operating instructions, thermal and
layout guidelines, a printed circuit board (PCB) layout, a schematic diagram,
and a bill of materials (BOM). For more detail information, please refer to
the RTQ2516-QT datasheet.
Performance Specification Summary
Summary of the RTQ2516-QT Evaluation Board performance specification is
provided in Table 1. The ambient temperature is 25°C.
Table 1. RTQ2516-QT Evaluation Board Performance Specification Summary
Specification| Test Conditions| Min| Typ| Max|
Unit
---|---|---|---|---|---
Input Voltage Range| | 1.4| 3.3| 6| V
Output Current| | 0| —| 2| A
Output Voltage Range| | 0.5| 2.5| 5.5| V
Line Regulation| VOUT + 0.5V ≤ VIN ≤ 6V, VIN ≥ 2.2V, IOUT = 100mA| —|
0.2| 0.4| %
Load Regulation| 100mA ≤ IOUT ≤ 1A| —| 0.5| 1.5| %
Dropout Voltage| IOUT = 1A, VIN ≥ 1.6V| —| 120| 200|
mV
IOUT = 1A, 1.4V ≤ VIN ≤ 1.6V| —| —| 400
IOUT = 1.5A, VIN ≥ 1.6V| —| 180| 300
IOUT = 1.5A, 1.4V ≤ VIN ≤ 1.6V| —| —| 500
IOUT = 2A, VIN ≥ 1.6V| —| 240| 400
IOUT = 2A, 1.4V ≤ VIN ≤ 1.6V| —| —| 600
Power-up Procedure
Suggestion Required Equipments
- RTQ2516-QT Evaluation Board
- DC power supply capable of at least 6V and 2A
- Electronic load capable of 2A
- Function Generator
- Oscilloscope
Quick Start Procedures
The Evaluation Board is fully assembled and tested. Follow the steps below to
verify board operation. Do not turn on supplies until all connections are
made. When measuring the output voltage ripple, care must be taken to avoid a
long ground lead on the oscilloscope probe. Measure the output voltage ripple
by touching the probe tip and groundring directly across the last output
capacitor.
Proper measurement equipment setup and follow the procedure below.
- With power off, connect the input power supply to VIN and GND pins.
- With power off, connect the electronic load between the VOUT and nearest GND pins.
- Turn on the power supply at the input. Make sure that the input voltage does not exceeds 6V on the Evaluation Board.
- Check for the proper output voltage using a voltmeter.
- Once the proper output voltage is established, adjust the load within the operating ranges and observe the output voltage regulation, quiescent current, dropout voltage, PSRR, noise and other performance.
Detailed Description of Hardware
Headers Description and Placement
Carefully inspect all the components used in the EVB according to the
following Bill of Materials table, and then make sure all the components are
undamaged and correctly installed. If there is any missing or damaged
component, which may occur during transportation, please contact our
distributors or e-mail us at
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 | Function |
|---|---|
| VIN | Supply input pin. |
| VOUT | Output of the regulator. |
| EN | Enable sense pin. |
| GND | System ground pin. |
Bill of Materials
VIN = 2.2V to 6V, VOUT = 0.8V to 5.5V, IOUT = 1A
Reference| Count| Part Number| Value| Description| Package| Manufacturer
U1| 1| RTQ2516GSP-QT| RTQ2516GSP-QT| LDO| SOP-8| RICHTEK
C1, C3| 2| GCJ32EC71H106MA01| 10μF| Capacitor, Ceramic, 50V, X7S| 1210| MURATA
C2, C3, C4| 3| GRM188R71H104KA93D| 0.1μF| Capacitor, Ceramic, 50V, X7R| 0603|
MURATA
C5| 1| 0603B103K500CT| 10nF| Capacitor, Ceramic, 50V, X7R| 0603| WALSIN
R1| 1| WR06X3002FTL| 30k| Resistor, Chip| 0603| WALSIN
R2| 1| WR06X7501FTL| 7.5k| Resistor, Chip| 0603| WALSIN
R3| 1| WR06X1002FTL| 10k| Resistor, Chip| 0603| WALSIN
Typical Applications
EVB Schematic Diagram
- The capacitance values of the input and output capacitors will influence the input and output voltage ripple.
- MLCC capacitors have degrading capacitance at DC bias voltage, and especially smaller size MLCC capacitors will have much lower capacitance.
Measure Result
Note:
- When measuring the input or output voltage ripple, care must be taken to avoid a long ground lead on the oscilloscope probe. Measure the output voltage ripple by touching the probe tip directly across the output capacitor.
- The C4 component manufacturer used for these measurements is MURATA.
Evaluation Board Layout
Figure 1 and Figure 2 are RTQ2516 Evaluation Board layout. This board is
constructed on two-layer PCB, outer layers with 1 oz. Cu and inner layers with
1 oz. Cu. 
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 TO BUYER OR USER FOR ANY AND ALL DAMAGES INCLUDING WITHOUT LIMITATION TO DIRECT, INDIRECT, SPECIAL, PUNITIVE OR CONSEQUENTIAL DAMAGES.
EVB_RTQ2516GSP-QT-00 February 2024
http://www.richtek.com