Fujitsu MB39C026 Manuel utilisateur

Fujitsu ASSP Product

1/14

Power Management

MB39C026 Evaluation Board

Rev 1.0E

June, 2008

MB39C026

Evaluation Board Manual

(SON

(SON-

-10)

10)

MB39C022

MB39C022-

-EVB03

EVB03

(MB39C026 and MB39C022 share the same evaluation board)

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MB39C026 Evaluation Board

The MB39C026 is a two channels power supply IC. It consists of one channel

DC/DC Converter and one channel LDO regulator. The DC/DC converter has fast

line transient response and load regulation with current mode control topology.

Moreover, the integrated LDO provides an auxiliary output supply for noise

sensitive circuit.

2. Evaluation Board Specification

1. Description

* CH1 Remark:

Maximum Output voltage is limited by the input voltage (VIN). The maximum

voltage CH1 could reach is 0.5V less than VIN.

# CH2 Remark:

The CH2 output voltage is limited by input voltage (VIN). The CH2 dropout of

MB39C026G is Vdrop. Thus the minimum input voltage should be Vdrop above

the CH2 output. Vdrop is 0.2V(Typ).

Min. Typ. Max.

3.2 3.7 5.5

CH1 0.8 1.2 5*

CH2 3.3#

CH1 0.8 1.2 5*

CH2 2.85

CH1 0.8 1.2 5*

CH2 1.8

CH1 0.8 1.8 5*

CH2 1.2

CH1 0 - 600

CH2 0 - 300

- 2.0 -

Oscillation Frequency

Output Current

Parameter

Input Voltage

MB39C026G

MB39C026J

MB39C026L

MB39C026N

Output Voltage

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4. Setup & Checkup

(1) Setup

• Connect a 3.7V power supply the VIN and PGND.

• Connect EN1 and EN2 = VIN.

• Connect VO1 and VO2 to loadings or measurement devices.

(2) Confirmation of Operation

• Turn on the power to VIN(power supply voltage).

•When IC operates normally, the voltage level at each output are as follows:

MB39C026G: VO1=1.2V, VO2=3.3V, POR=VIN

MB39C026J: VO1=1.2V, VO2=2.85V, POR=VIN

MB39C026L: VO1=1.2V, VO2=1.8V, POR=VIN

MB39C026N: VO1=1.8V, VO2=1.2V, POR=VIN

3. Terminal information

Pin Name Description

VIN Input voltage terminal

PGND Ground terminal for power supply

VO1 CH1 DC/DC converter output terminal

PGND1 Ground terminal for CH1 DC/DC converter

VO2 CH2 LDO output terminal

AGND Ground terminal for LDO output

POR Power-On-Reset output terminal

EN1 CH1 DC/DC converter control terminal

EN2 CH2 LDO control terminal

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5. Evaluation Board Layout

MB39C022-EVB03 Rev 1.0 (Top View)

Top Side Silkscreen

Bottom Side Silkscreen

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MB39C026 Evaluation Board

Board Layout (Top View)

Top Side Metal

Bottom Side Metal

MB39C022-EVB03 Rev 1.0

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MB39C026 Evaluation Board

6. Circuit Diagram

7. Circuit Parts List

MB39C022-EVB03 Rev1.0

EN21

VIN18

VIN22

POR4

EN17

GND1

VOUT2

GND2

MB39C026

(SON-10)

VIN

PGND

POR

PGND1

VO1

VO2

AGND

4.7uF

1uF

4.7uF

JP3

Short

2.2uH

R5-2

R5-1

300k

or 499k

JP4

Short

100k

22pF

PGND

AGND

PGND

: No Mount

4.7uF

EN1

EN2

JP1

JP2

For VO1=1.2V: R5-1=300k

For VO1=1.8V: R5-1=499k

Count Designator Description Part Number Manufacturer

1 U1 Power IC MB39C026 Fujitsu

2 C1, C2 Capacitor 4.7uF (10V) C1608JB1A475K TDK

1 C3 Capacitor 22pF (50V) C1608CH1H220J TDK

2 C4, C5 Capacitor 1uF (16V) C1608JB1C105K TDK

1 L1 Inductor 2.2uH RDC=76mVLF4012AT-2R2M1R5 TDK

3 R1, R2, R3 Resistor 1M (1%) - -

Resistor 300k (1%) for 1.2Voutput - -

Resistor 499k (1%) for 1.8Voutput

2 R5-2, R7 Resistor 0R - -

1 R6 Resistor 100k (1%) - -

VIN, VO1, VO2,

POR, PGND, PGND1,

AGND, EN1, EN2

Connecting Pins WT-2-1 MacEight

No Mount JP1, JP2 Header 1X2 - -

No Mount R4 1M - -

No Mount C6 Capacitor 4.7uF (10V) - -

Short JP3, JP4 Jumper (pattern short) - -

TDK: TDK Corporation

R5-11

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8. Initialization

(

)

(

)

V21=

100

k100+k300

×V30=

6R+5R

ref

V=1VO ..

Ω

FB 6

VO1

R5-2

R5-1

300k

499k

22pF

100k

4.7uF

(1) Output Voltage Setting

EN1

Set EN1 to VIN to start the buck DC/DC converter (VO1). R1 pull-down EN1 to

GND and disable VO1 if EN1 has no input.

EN2

Set EN2 to VIN to start the LDO converter (VO2). R2 pull-down EN2 to GND

and disable VO2 if EN2 has no input.

Power On Reset (POR)

R3 and R4 are the pull-up resistors for POR (Pin 4). A 1M



resistor is required

to placed at either R3 or R4. When R3 has a 1M



resistor and R4 is open; the

POR will be connected VIN. When R4 has a 1M



resistor and R3 is open; the

POR pin will be connected to VO1.

By default, only R3 require a 1M



resistor while R4 is open.

(2) Input Signal Setting

(

)

(

)

1.8V=

100k



100k+499k

×0.3V=

R6+R5

ref

V=VO1

The output voltage of VO1 can be adjusted by

the external resistor divider.

As illustrated below:

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9. Reference Data

(1) Efficiency

CH1 Test Condition:

EN1=VIN; EN2=0V

VO1=1.2V; C1=C2=4.7uF

(2) DC/DC Load Regulation

CH1 Test Condition:

EN1=VIN; EN2=0V

VO1=1.2V; C1=C2=4.7uF

CH1 Load Regulation

1.1

1.12

1.14

1.16

1.18

1.2

1.22

1.24

1.26

1.28

1.3

0 0.1 0.2 0.3 0.4 0.5 0.6

IO1 Load Current (A)

VO1 Output Voltage (V)

VIN=3.7V

VIN=4.3V

VIN=5.5V

CH1 Efficiency

0.001 0.01 0.1 1

IO1 Load Current (A)

Efficiency (%)

VIN=3.7V

VIN=4.3V

VIN=5.5V

CH1 Test Condition:

EN1=VIN; EN2=0V

VO1=1.8V; C1=C2=4.7uF

CH1 Test Condition:

EN1=VIN; EN2=0V

VO1=1.8V; C1=C2=4.7uF

CH1 Efficiency

100

0.001 0.01 0.1 1

IO1 Load Current (A)

Efficiency (%)

VIN=3.7V

VIN=4.3V

VIN=5.5V

CH1 Load Regulation

1.7

1.72

1.74

1.76

1.78

1.8

1.82

1.84

1.86

1.88

1.9

0 0.1 0.2 0.3 0.4 0.5 0.6

IO1 Load Current (A)

VO1 Output Voltage (V)

VIN=3.7V

VIN=4.3V

VIN=5.5V

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CH1 Test Condition:

EN1=VIN; EN2=0V

VO1=1.2V; C1=C2=4.7uF

(3) DC/DC Line Regulation

CH1 Test Condition:

EN1=VIN; EN2=0V

VO1=1.8V; C1=C2=4.7uF

CH1 Test Condition:

EN1=EN2=VIN;

VO1=1.8V; IO1=250mA; C1=C2=4.7uF

VO2=3.3V; IO2=150mA; C4=C5=1uF

(4) Switching Waveform

CH1 Test Condition:

EN1=EN2=VIN;

VO1=1.8V; IO1=20mA; C1=C2=4.7uF

VO2=3.3V; IO2=150mA; C4=C5=1uF

CH1 Line Regulation

1.1

1.12

1.14

1.16

1.18

1.2

1.22

1.24

1.26

1.28

1.3

3.2 3.7 4.2 4.7 5.2

VIN Input Voltage (V)

VO1 Output Voltage (V)

IO1=0mA

IO1=300mA

IO1=600mA

VLx

5V/div

ILx

100mA/div

VO1

20mV/div

VO2

20mV/div

500ns/div

VLx

5V/div

ILx

100mA/div

VO1

20mV/div

VO2

20mV/div

5us/div

CH1 Line Regulation

1.7

1.72

1.74

1.76

1.78

1.8

1.82

1.84

1.86

1.88

1.9

3.2 3.7 4.2 4.7 5.2

VIN Input Voltage (V)

VO1 Output Voltage (V)

IO1=0mA

IO1=300mA

IO1=600mA

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MB39C026 Evaluation Board

MB39C026G CH2 Test Condition:

EN2=VIN; EN1=0V

VO2=3.3V; C4=C5=1uF

(5) LDO Load Regulation

MB39C026J CH2 Test Condition:

EN2=VIN; EN1=0V

VO2=2.85V; C4=C5=1uF

MB39C026L CH2 Test Condition:

EN2=VIN; EN1=0V

VO2=1.8V; C4=C5=1uF

MB39C026N CH2 Test Condition:

EN2=VIN; EN1=0V

VO2=1.2V; C4=C5=1uF

CH2 Load Regulation

3.2

3.22

3.24

3.26

3.28

3.3

3.32

3.34

3.36

3.38

3.4

0 0.1 0.2 0.3

IO2 Load Current (A)

VO2OutputVoltage(V)

VIN=3.7V

VIN=4.3V

VIN=5.5V

CH2 Load Regulation

1.7

1.72

1.74

1.76

1.78

1.8

1.82

1.84

1.86

1.88

1.9

0 0.1 0.2 0.3

IO2 Load Current (A)

VO2 Output Voltage (V)

VIN=3.7V

VIN=4.3V

VIN=5.5V

CH2 Load Regulation

1.1

1.12

1.14

1.16

1.18

1.2

1.22

1.24

1.26

1.28

1.3

0 0.1 0.2 0.3

IO2 Load Current (A)

VO2 Output Voltage (V)

VIN=3.7V

VIN=4.3V

VIN=5.5V

CH2 Load Regulation

2.75

2.77

2.79

2.81

2.83

2.85

2.87

2.89

2.91

2.93

2.95

0 0.1 0.2 0.3

IO2 Load Current (A)

VO2 Output Voltage (V)

VIN=3.7V

VIN=4.3V

VIN=5.5V

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