Recom RBB10-2.0-EVM-1 User Manual

• Evaluation platform for RBB10 buck/boost regulators

Features

• Input voltage can be lower, higher or the same
as output voltage

• Class B EMC filter layout

Evaluation
Module

• Built-in thermal management

• Easy evaluation of modes, trimming, enable and
sensing fufnction of the RBB10 modules

Description

The RBB10-2.0-EVM-1 evaluation board generates a regulated output voltage with a current up to
4A from an external DC supply which can be higher, lower or the same as the set output voltage.
The output voltage is preset to 3.3V or 5V but can be adjusted between 1.0V and 5.5V using on-board
resistors. All of the functions of the RBB10-2.0 regulator such as the different operating modes, output
trim, enable, and the sense input can be easily evaluated using the break out connectors.

Typical applications that can be evaluated include:

USB voltage converter/regenerator: 3.3V or 5V output from a 3.3V (+60%/-30%) or from a
5V (+10%/-50%) supply. A stable output voltage can be regenerated even if the input voltage is outside
of the USB voltage specification.

Evaluation Module

RBB10-2.0-EVM-1

With a regulated supply voltage, the following continuous output current limits apply:

nom. Input

(1)

Voltage

3.3V 1.8V 4A max

3.3V 3.3V 2.8A max

3.3V 5V 2.2A max

5V 1.8V 4A max

5V 3.3V 4A max

5V 5V 3.2A max

Notes:

Note1: For detail information please refer to “Safe Operating Area” graph on page P-2

Battery stabiliser: the output can be set to deliver a stable 5V or 3.3V from a nominal 3V, 3.7V or

4.2V Lithium Ion or 3V/4.5V alkaline battery pack. In standby, the board consumes only 5µA.

Supercapacitor booster: the output can be set to deliver a stable 5V or 3.3V from a single
supercapacitor (2.3V – 2.7V) or from two supercapacitors wired in series (2.3V – 5.4V).

Low voltage regulator with sense: 1V, 1.2V, 1.8V or 2.5V output with up to 4A current.

Output

Voltage

Output

Current

Selection Guide

Part Input Output Output
Number Voltage Range Voltage Current
[VDC] [VDC] [A]

RBB10-2.0-EVM-1 2.3 - 5.5 1.0 - 5.5 2.0
(5VDC preset) (4.0 buck mode)

Caution:

ESD sensitive. Always follow ESD preventative procedures when
handling the product!

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REV.: 1/2019 P-1

RBB10-2.0-EVM-1

Output Current [A]

Evaluation Module

Specifications (measured @ Ta= 25°C, full load after warm up unless otherwise stated)

Quick Start Guide

1) Connect Sense to the required potential.
The Sense input is via R3 directly at the power module output. To compensate for ohmic losses of the filter, desolder the R3 resistor
and move it to the position of R4.
If you want to sense directly on the load, desolder R3 and connect the middle pin of Con 2 to the positive potential of the load with a

separate connection.

2) If a different output voltage is required, fit R5 or R6.

3) Connect Con1 to a DC power supply and check output voltage.

4) Connect Con2 to the load.

5) Enable the device on Con3.
The converter is normally on. You can disable the converter by pulling the Enable pin to GND with a switch, open collector driver or logic

input. R1 or R2 can be used to change the default function from normally on to normally off.

6) Modes:
The RBB10-2.0 has the possibility to work in two regulation modes:

6.1) Powersave Mode (standard)
This mode is the best for use at low loads to reduce power consumption and extend battery life. In this mode the internal power

consumption is reduced by using burst mode for loads under 350mA and PWM for loads above 350mA. The drawback is a 1-3 %
higher output voltage at low load than full load.

6.2) Fixed PWM mode
In PWM mode the device accurately regulates the output voltage independently of the load current. The drawback is a higher

internal power consumption and shorter battery life at lower loads. Pull down the Mode pin on Con4 to GND or solder a 0Ω

resistor a position R7 to enter this mode.

Safe Operating Area

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0

2.3 2.7 3.1

3.5 3.9 4.3 4.7 5.1 5.5

3.3 3.6 5.0

Input Voltage [VDC]

5.5Vout

5.0Vout

3.3Vout

1.0Vout

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REV.: 1/2019 P-2

RBB10-2.0-EVM-1

Evaluation Module

Specifications (measured @ Ta= 25°C, full load after warm up unless otherwise stated)

Component Placement

RECOM 12.2x12.2mm Evaluation Board
version 03

L1

L7

L2

C7

C8

C9

1

2

3

4

5

VIN

GND

L3

C5

C1

C2

CON1

IC1

C6

C4

C3

L4

L8

L5

R3

R5

R6

L6

SENSE

VOUT

1

CON2

GND

2

3

4

5

R4

R2

CON3

EN

Connector Description

Con1

Pin Name Description

1,2 Vin Positive Input Voltage (observe correct polarity!)

3 NC Not connected

4,5 GND Negative Input Voltage (Common GND )

Con3

Pin Name Description

1 ON Connect to Vin

2 EN Enable Pin (leae open if not used)

3 OFF Connected to GND

R8

R1

OFFON

R7

CON4

SEQ

VSEL

MODE

PG

Con2

Pin Name Description

1,2 Vout Positive Output Voltage

3 SENSE Output Voltage Sense Pin (leave open if not used)

4,5 GND Negative Output Voltage (Common GND )

Con4

Pin Name Description

1 PG Not used

2 SEQ Not used

3 MODE Regulation mode (leave open if not used)

4 VSEL Not used

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REV.: 1/2019 P-3

RBB10-2.0-EVM-1

Evaluation Module

Specifications (measured @ Ta= 25°C, full load after warm up unless otherwise stated)

Schematic

L7

V

GND

VSEL

1

1

1

vi

CON1-A

1

CON1-B

2

IN

EN

IC1-M

1

CON3-A

en

2

CON3-B

4

CON1-D

5

CON1-E

CON4-D

4

vsel

R8

2

0E0

E4

0603

1

100mW

1

1

C1

C2

1206

1210

2

2

SEQ

2

CON4-B

1

R2
0603

1 2

R1
0603

1 2

1

C9
1206

2

L1 0603

L2 0805

L3 1206

2

2

GND3

SENSE

A4

IC1-A

V

OUT

NC

TRIM

GND2

MODE

R3

A5

0603

1 2

B5

C5

2

D1

1

E5

B1

E2

2

vin

2

1

C5
1206

2

3

CON3-C

A1

V

IN

1

A2

C6
1206

2

C1

EN

E1

NC

A3

GND

R5
0603

R6 0603

1 2

L8

1

1

1

1

vout

1

1

C8

C7

2

2

1206

1206

L4 0603

L5 0805

L6 1206

R7

0603

1 2

CON4-A

CON2-D

CON2-E

1

4

5

3

CON4-C

2

2

2

2

1

2

PG

GND

MODE

CON2-A

vo

1

C3

C4

1206

1210

2

1

2

V

OUT

CON2-B

R4

0603

1 2

sense

SENSE

3

CON2-C

Description

IC1 is the RBB10-2.0 power module.

C1,C2,L1,L2,L3,L7,C5,C6 give the possibility to try different input EMC filters. The populated filter is designed to meet EN55032 class B has
C1, L7 and C6 fitted.

C7,C8,L4,L5,L6,L8,C3,C4 give the possibility to try different output EMC filters. The populated filter is designed to meet EN55032 class B has
L8 and C3 fitted.

R1 and R2 give the possibility to preset the Enable pin in other configurations.
These resistors are not populated. The default for IC1 is always on.

If R2 is fitted, then the enable is normally on, pull down to ground to turn off. If R1 is fitted, the enable is normally off, pull up to Vin to turn on.
Refer to the datasheet of IC1 for more information.

C9 is not populated on this board.

R3 is a populated 0Ω resistor for output voltage sensing directly at the module output. If the output sense input is required at the point of load,
unsolder R3 and connect the Sense pin to the load.

R4 gives the possibility to compensate the output voltage for any voltage drop through the EMC filter by unsoldering R3 and soldering it at the
position of R4.

R7 and R8 are not populated on this Board.

R5 and R6 give the possibility to trim the output voltage between 1.0V and 5.5V (see calculations and trim table below). Fit only R5 or R6.

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REV.: 1/2019 P-4

RBB10-2.0-EVM-1

Evaluation Module

Specifications (measured @ Ta= 25°C, full load after warm up unless otherwise stated)

OUTPUT VOLTAGE TRIMMING

The RBB10-2.0 series offers the feature of trimming the output voltage over a range between 1.0V and 5.5V by using external trim resistors.
The values for trim resistors shown in trim tables below are according to standard E96 values; therefore, the specified voltage may slightly vary.

Trim up Trim down

Trim

+V

out

Vout

= nominal output voltage [VDC]

nom

= trimmed output voltage [VDC]

Vout

set

= reference voltage [VDC]

V

ref

= trim up resistor [W]

R

up

= trim down resistor [W]

R

down

, R2, R3 = internal resistors [W]

R

1

Calculation:

R

R

=

up

Vout

1

- V

set

nom

Practical Example RBB10-2.0:

R

=

up

629k

5.5 - 5.0

GND

- R

- 1k =

2

1M26W

R

up

Trim

Vout

nom

R

1

R

down

R

2

R

5VDC 629kW 1kW 788kW 0.805

(Vout

- V

) x R

set

R

R

down

down

=

=

Vout

(4.0 - 0.805) x 788k

- Vout

nom

5.0 - 4.0

ref

set

=

V

ref

2M52W

3

3

R

according to E96 ≈ 1M27W

up

R

according to E96 ≈ 2M55W

down

RBB10-2.0

Trim up

Vout

R

up

set

(E96) ≈

=

5.1 5.2 5.3 5.4 5.5 [VDC]

6M34 3M16 2M10 1M58 1M27 [W]

Trim down

Vout

R

down

=

set

(E96) ≈

4.5 4.0 3.5 3.3 3.0 2.5 2.0 1.8 1.5 1.0 [VDC]

5M90 2M55 1M43 1M15 866k 536k 316k 243k 158k 38k3 [W]

DIMENSION AND PHYSICAL CHARACTERISTICS

Parameter Type Value

Dimension (LxWxH) 90.0 x 60.0 x 26.0mm

Weight 23.3g typ.

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REV.: 1/2019 P-5

RBB10-2.0-EVM-1

Evaluation Module

Specifications (measured @ Ta= 25°C, full load after warm up unless otherwise stated)

Layout

Top Layer Layer 2 (GND)

Layer 3 (GND)

Notes:

Note2: Visit www.recom-power.com/eval-ref-boards to download the Gerber files

BOM

Comp. Description Manufacturer Part Number Manufacturer Remarks

C1 22µF 10V X7R 1206 CL31B226MPHNNNE Samsung

C2 10µF ±10% 63V X7R MLCC 1210 GRM32ER71J106KA12L Murata not mounted

C3 10µF 35V X7R 1206 GMK316AB7106KL-TR Taiyo Yuden

C4 10µF ±10% 63V X7R MLCC 1210 GRM32ER71J106KA12L Murata not mounted

C5 22µF 10V 1206 CL31B226MPHNNNE Samsung

C6 22µF 10V X7R 1206 CL31B226MPHNNNE Samsung

C7 10µF 35V X7R 1206 GMK316AB7106KL-TR Taiyo Yuden not mounted

C8 10µF 35V X7R 1206 GMK316AB7106KL-TR Taiyo Yuden not mounted

C9 CAP CER 100nF 50V X7R 1206 CL31B104KBCNNNC Samsung not mounted

CON1 RS Pro Header 2.54mm 5 W81105T3825RC RS

CON2 RS Pro Header 2.54mm 5 W81105T3825RC RS

CON3 RS Pro Header 2.54mm 3 W81103T3825RC RS

CON4 RS Pro Header 2.54mm 4 W81104T3825RC RS

L1 FERRITE BEAD 600 OHM 0603 1LN 742792651 Wurth not mounted

L2 FERRITE BEAD 330 OHM 0805 1LN FBMH2012HM331-T Taiyo Yuden not mounted

Bottom (GND)

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continued on next page

REV.: 1/2019 P-6

RBB10-2.0-EVM-1

The product information and specifications may be subject to changes even without prior written notice.The product has been designed for various applications; its suitability lies in the responsibility of each customer. The
products are not authorized for use in safety-critical applications without RECOM’s explicit written consent. A safety-critical application is an application where a failure may reasonably be expected to endanger or cause
loss of life, inflict bodily harm or damage property. The applicant shall indemnify and hold harmless RECOM, its affiliated companies and its representatives against any damage claims in connection with the unauthorized

use of RECOM products in such safety-critical applications.

Evaluation Module

Specifications (measured @ Ta= 25°C, full load after warm up unless otherwise stated)

Comp. Description Manufacturer Part Number Manufacturer Remarks

L3 FERRITE BEAD 300 OHM 1206 1LN 74279215 Würth

L4 FERRITE BEAD 600 OHM 0603 1LN 742792651 Wurth not mounted

L5 FERRITE BEAD 330 OHM 0805 1LN FBMH2012HM331-T Taiyo Yuden not mounted

L6 FERRITE BEAD 300 OHM 1206 1LN 74279215 Würth

L7 FERRITE BEAD 98 OHM 2SMD 1LN 7427932 Würth not mounted

L8 FERRITE BEAD 98 OHM 2SMD 1LN 7427932 Würth not mounted

R1 RES SMD 1M OHM 1% 1/10W 0603 RC0603FR-071ML Yageo not mounted

R2 RES SMD 1M OHM 1% 1/10W 0603 RC0603FR-071ML Yageo not mounted

R3 RES SMD 0.0OHM JUMPER 1/10W 0603 RC0603JR-070RL Yageo

R4 RES SMD 0.0OHM JUMPER 1/10W 0603 RC0603JR-070RL Yageo not mounted

R5 RES SMD 1/10W 0603 not mounted

R6 RES SMD 1/10W 0603 not mounted

R7 RES SMD 0.0OHM JUMPER 1/10W 0603 RC0603JR-070RL Yageo not mounted

R8 RES SMD 0.0OHM JUMPER 1/10W 0603 RC0603JR-070RL Yageo not mounted

SP1-4 PCB Spacer 4mm

IC1 RBB10-2.0 Module RECOM

PACKAGING INFORMATION

Parameter Type Value

Packaging Dimension (LxWxH) carton 200.0 x 135.0 x 68.0mm

Packaging Quantity 1pcs

Contents

• RBB10-2.0-EVM-1 Evaluation Module PCB

• Terms and Conditions

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REV.: 1/2019 P-7