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RTKP51045DE0000BU
The RTKP51045DE0000BU evaluation board
provides a simple platform to evaluate the 3.5×3.5mm
20-Ld QFN
RRP51045
(LDO).
The RRP51045 is an ultra-low noise, high PSRR LDO
regulator capable of sourcing up to 4A of load current
with very low dropout. The output voltage can be
programmed from 0.5V to 2.075V using voltage
setting pins on the IC in 25mV steps. The evaluation
board has convenient jumpers to exercise these pins.
External feedback resistors can still be used for
higher output voltage applications, allowing the output
voltage to be programmed anywhere from 0.5V to
5.1V.
The LDO operates from an input voltage of 1.4V to
6.5V without VBIAS and 1.1V to 6.5V with VBIAS.
V
IN
10µF
V
BIAS
R16UZ0109EU0100 Rev.1.00
Sep 3, 2024
low-dropout linear regulator
C
(optional)
1µF
10µF
Figure 1. Typical Application Schematic
Features
▪ Output voltage set pins easily programmed with
JP_VSET
▪ Switch between voltage set pins or external resistor
divider using jumper JP_FB
▪ Convenient shutdown mode function using jumper
JP_EN
▪ Power-good (PG) indication test point
▪ V
banana jack or turret for applications, where
BIAS
V
< 1.4V
IN
▪ BNC_VIN and BNC_VOUT connections for PSRR
and output noise testing
Specifications
This evaluation board is specified for the following
operating conditions:
▪ Input voltage range: 1.4V to 6.5V without VBIAS
and 1.1V to 6.5V with VBIAS
▪ V
voltage range: 3V to 6.5V ultra-low output
BIAS
noise: 7µVRMS
VIN
VOUT
RRP51045
SNS
EN
CNR/SS
FB
VBIAS
PG
25mV
0.8V
Evaluation Board Manual
10kΩ
22µF
© 2024 Renesas Electronics
V
,
OUT
I
OUT (MAX)
4A
C
(optional)
V
PG
Page 1

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Summary of Contents for Renesas RTKP51045DE0000BU

  • Page 1 Evaluation Board Manual RTKP51045DE0000BU Features The RTKP51045DE0000BU evaluation board provides a simple platform to evaluate the 3.5×3.5mm ▪ Output voltage set pins easily programmed with 20-Ld QFN RRP51045 low-dropout linear regulator JP_VSET (LDO). ▪ Switch between voltage set pins or external resistor...
  • Page 2: Table Of Contents

    RTKP51045DE0000BU Evaluation Board Manual Contents Functional Description ..............3 Setup and Configuration .
  • Page 3: Functional Description

    RTKP51045DE0000BU Evaluation Board Manual Functional Description The RTKP51045DE0000BU evaluation board provides a simple platform for demonstrating the features of the RRP51045 low-noise, high-PSRR LDOs, helping design and system engineers evaluate critical performance parameters for their applications. Setup and Configuration 1.1.1...
  • Page 4 RTKP51045DE0000BU Evaluation Board Manual Table 1 provides a list of all the possible voltage set pin configurations and the corresponding output voltage for the RRP51045. Table 1. Voltage Set Pin Configuration and Corresponding Output Voltages for RRP51045 (V = 0.5V)
  • Page 5 RTKP51045DE0000BU Evaluation Board Manual 1.1.3 External Feedback Resistors For applications with an output voltage exceeding 2.075V, use an external feedback resistor divider (R ) as shown in Figure 3. This layout extends the output voltage range up to 5.1V. VI N...
  • Page 6: Recommended Equipment

    RTKP51045DE0000BU Evaluation Board Manual Table 2. Recommended FB Resistor Values for Common Output Voltages (V = 0.5V) (Cont.) (kΩ) (kΩ) Accuracy OUT(TARGET) OUT(CALCULATED) 10.2 3.92 1.801 -0.06% 12.4 4.42 1.903 -0.14% 12.4 3.09 2.506 -0.26% 12.4 2.49 2.990 0.33% 10.7 1.91...
  • Page 7: Quick Start Guide

    RTKP51045DE0000BU Evaluation Board Manual Quick Start Guide 1.3.1 Internal FB Resistor Configuration Start Guide 1. If not using an external supply on EN, skip step 6 and use the JP_EN jumper to short EN to VIN for automatic enabling. 2. Use the JP_FB jumper to short the SNS pin to VOUT.
  • Page 8: Board Design

    RTKP51045DE0000BU Evaluation Board Manual Board Design Figure 4. RTKP51045DE0000BU Evaluation Board (Top) PCB Layout Guidelines The following are recommendations for the PCB layout to achieve optimal LDO performance: ▪ Ensure the input and output capacitors have a good ground connection and place them as close to the IC as possible.
  • Page 9: Schematic Diagrams

    UNNAMED_3_JUMPER3_I400_IN3 GND_TP2 JP_FB1 JP_EN1 EN_TP1 FB_TP1 VBIAS_TP1 UNNAMED_3_BANANAJACK_I419_IN1NC VBIAS1 UNNAMED_3_CONN12_I399_IN1 UNNAMED_3_CONN12_I399_IN11 GND_VBIAS1 Figure 5. RTKP51045DE0000BU Schematic Diagram Bill of Materials Reference Manufacturer Part Description Manufacturer Designator Number C_BIAS, C_IN, C_OUT CAP, SMD, 0805, 10µF, 16V, 10%, X7R, RoHS Samsung CL21B106KOQNNNE...
  • Page 10: Board Layout

    RTKP51045DE0000BU Evaluation Board Manual Reference Manufacturer Part Description Manufacturer Designator Number CONN-HEADER,1×3, BREAKAWY 1×36, JP_EN, JP_FB BERG/FCI 68000-236HLF 2.54mm, RoHS RESISTOR, SMD, 0603, 0.1%, MF, DNP-PLACE R_BOT, R_TOP HOLDER R_PG RES, SMD, 0603,10K, 1/10W, 1%, TF, RoHS Venkel CR0603-10W-1002FT RRP51045 LDO, 20-QFN, Ultra Loise Noise High...
  • Page 11: Typical Performance Graphs

    RTKP51045DE0000BU Evaluation Board Manual Figure 10. Bottom Layer Typical Performance Graphs Operating conditions unless otherwise noted: T = 25°C, V = open, and PG pulled up to V with 10kΩ. BIAS VIN=1.1V, VOUT=0.7V VOUT=0.5V VIN=1.3V, VOUT=0.9V VOUT=0.6V VIN=1.9V, VOUT=1.5V VOUT=0.7V VOUT=0.8V...
  • Page 12: Ordering Information

    RTKP51045DE0000BU Evaluation Board Manual Ordering Information Part Number Description RTKP51045DE0000BU RRP51045 Evaluation Board Revision History Revision Date Description 1.00 Sep 3, 2024 Initial release R16UZ0109EU0100 Rev.1.00 Page 12 Sep 3, 2024...
  • Page 13 Renesas' products are provided only subject to Renesas' Terms and Conditions of Sale or other applicable terms agreed to in writing. No use of any Renesas resources expands or otherwise alters any applicable warranties or warranty disclaimers for these products.

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