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RTKA211651DE0000BU
The
RAA211651
is an integrated 60V, 5A
synchronous buck regulator with constant on time
modulating scheme. It supports a wide input voltage
range from 4.5V to 60V and adjustable output voltage.
The RAA211651 is offered in a 28Ld QFN package.
The RTKA211651DE0000BU evaluation board
provides a quick and comprehensive platform for
evaluating the high-performance features of
RAA2116510 buck regulator.
The RTKA211651DE0000BU evaluation board
operates from a supply voltage of 4.5V to 60V
the capability of delivering continuous load of 5A.
R
RAA211651
SET
SET
PG
R
PG
COMP
SS
AVCC
R
AVCC
C
AVCC
PVCC
PGND
C
PVCC
Figure 1. RTKA211651DE0000BU Block Diagram
R16UH0013EU0100 Rev.1.0
May 6, 2021
PVIN
EN
BOOT
C
BOOT
L
PHASE
EBIAS
R
FB1
C
EBIAS
FB
R
FB2
V3_DLY
C
DLY
AGND
Features
▪ Switch selectable EN or option to drive it by
external signal
▪ Internal and external compensation options
▪ Internal and external soft-start options
▪ Adjustable delay time options
▪ Options to connect EBIAS to V
external source
▪ Output voltage programmable with external
with
feedback resistors
DC
▪ Options to use internal feedback resistors for 3.3V
V
OUT
▪ Connectors and test points for easy probing and
VIN
data acquisition
C
IN
Specifications
This board is configured and optimized for the
EN
following operating conditions:
▪ Input voltage range:4.5V to 60V
V
OUT
(3.3V)
▪ Output voltage: 3.3V
▪ Up to 5A output current capability
C
OUT
▪ Internal compensation
▪ Internal soft-start of 2ms
▪ Start-up/shutdown delay of 2ms
▪ EBIAS is connected to V
▪ Operating temperature range: -40°C to +125°C
Evaluation Board Manual
OUT
OUT
© 2021 Renesas Electronics
or drive by
Page 1

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Summary of Contents for Renesas RTKA211651DE0000BU

  • Page 1 ▪ Start-up/shutdown delay of 2ms AVCC ▪ EBIAS is connected to V V3_DLY AVCC AVCC ▪ Operating temperature range: -40°C to +125°C PVCC PGND AGND PVCC Figure 1. RTKA211651DE0000BU Block Diagram R16UH0013EU0100 Rev.1.0 Page 1 May 6, 2021 © 2021 Renesas Electronics...
  • Page 2: Table Of Contents

    RTKA211651DE0000BU Evaluation Board Manual Contents Functional Description ..............3 Operating Range .
  • Page 3: Functional Description

    Operating Range The RTKA211651DE0000BU evaluation board evaluates the RAA211651 with PVIN from 4.5V to 60V and continuous load of 5A. For proper functioning of the evaluation board, Renesas recommends operating the board within the specifications. The inductance, capacitance and R values for the regulator are chosen for 3.3V V...
  • Page 4: Connectors, Test Points, Selection Switches, And Jumper Descriptions

    1.4.2 Soft-Start The RTKA211651DE0000BU is set for an internal soft-start of 2ms. To change the soft-start time, remove R10 and update C6 to get the required soft-start time using Equation (EQ. 9) ...
  • Page 5: Set Resistor

    RTKA211651DE0000BU Evaluation Board Manual 1.4.4 Set Resistor The RTKA211651DE0000BU is set with R8 = 82.5kΩ, which sets for switching frequency close to 500kHz for of 3.3V. Note: The switching frequency varies with the load. R8 can be changed for different operating condition using Equation ...
  • Page 6: Board Design

    RTKA211651DE0000BU Evaluation Board Manual 2. Board Design Figure 2. RTKA211651DE0000BU Evaluation Board (Top) Figure 3. RTKA211651DE0000BU Evaluation Board (Bottom) R16UH0013EU0100 Rev.1.0 Page 6 May 6, 2021...
  • Page 7: Layout Guidelines

    The printed circuit board (PCB) layout is critical for proper operation of the RAA211651. The following guidelines are recommended to achieve good performance. 1. Use multilayer PCB structure to achieve optimized performance. Renesas recommends using a four layer PCB with 2oz copper on outer and 1oz copper in inner layers.
  • Page 8: Schematic Diagram

    UNNAMED_3_GTSERIES_I834_NC Default Default BLACK GND_5 PVIN_1 RAA2116514GNP#HA0 BOOT BOOT PVIN PGND PGND PGND PGND PVIN PVIN PVIN EBIAS PVIN PVIN PVCC PVCC EBIAS Default EBIAS AVCC GND_3 Default BLACK AVCC AVCC AVCC AVCC V3_DLY Default AVCC Figure 4. RTKA211651DE0000BU Schematic...
  • Page 9: Bill Of Materials

    RTKA211651DE0000BU Evaluation Board Manual Bill of Materials Manufacturer Reference Designator Description Manufacturer Part Number SWITCH-TOGGLE, TH, 5PIN, SPDT, 2POS, C&K GT11MCBE On-None-On, ROHS EN, EBIAS, PVIN_1 CONN-Miniature Red Test Point, Vertical, Keystone 5000 ROHS GND_2, GND_3, CONN-Miniature Black Test Point, Vertical,...
  • Page 10: Board Layout

    RTKA211651DE0000BU Evaluation Board Manual Board Layout Figure 5. Silkscreen Top Layer Figure 6. Top Layer Figure 7. Layer 2 Figure 8. Layer 3 Figure 10. Silkscreen Bottom Layer Figure 9. Bottom Layer R16UH0013EU0100 Rev.1.0 Page 10 May 6, 2021...
  • Page 11: Typical Performance Graphs

    RTKA211651DE0000BU Evaluation Board Manual 3. Typical Performance Graphs PVIN = 24V, V = 3.3V, L = 3.3µH, C = 80µF, R = 82.5kΩ, T = +25°C, internal compensation, internal soft-start unless otherwise stated. PHASE 10V/Div 5A/Div Vin = 5V Vin = 24V...
  • Page 12 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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