Fujitsu MB39C026 User manual

Fujitsu ASSP Product
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Power Management
MB39C026 Evaluation Board
Rev 1.0E
June, 2008
MB39C026
MB39C026
Evaluation Board Manual
Evaluation Board Manual
(SON
(SON- -10) 10)
MB39C022
MB39C022- -EVB03 EVB03
(MB39C026 and MB39C022 share the same evaluation board)
(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
2. Evaluation Board Specification
1. Description
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
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
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
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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6. Circuit Diagram
6. Circuit Diagram
7. Circuit Parts List
7. Circuit Parts List
MB39C022-EVB03 Rev1.0
EN21
VIN18
VIN22
POR4
EN17
GND1
10
LX
9
FB
6
VOUT2
3
GND2
5
MB39C026
(SON-10)
VIN
PGND
POR
PGND1
VO1
VO2
AGND
C1
4.7uF
C4
1uF
C5
1uF
C2
4.7uF
R4
1M
R1
1M
R2
1M
JP3
Short
L1
2.2uH
R5-2
0k
R5-1
300k
or 499k
JP4
Short
R6
100k
R7
0R
C3
22pF
PGND
AGND
AGND
AGND
AGND
AGND
PGND
R3
1M
: No Mount
C6
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%) - -
9
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
8. Initialization
(
)
(
)
V21=
k
100
k100+k300
×V30=
6
R
6R+5R
×
ref
V=1VO ..
Ω
Ω
Ω
FB 6
VO1
R5-2
0R
R5-1
300k
or
499k
C3
22pF
R6
100k
C2
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
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
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
10
20
30
40
50
60
70
80
90
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
0
10
20
30
40
50
60
70
80
90
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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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