FX5545G108
Vishay
The Smallest and Low Profile
0.9V to 4.5V*, 4A with 570W/in
3
Power Density
Efficiency up to 95% DC/DC Buck Converter
FEATURES
•
Fully integrated DC/DC converter
•
High efficiency over large load range
•
100% duty cycle
•
Power density - more than 570W/inch
3
•
1µA shutdown current
•
2.5V to 6V input range (1Li+ and 3-cell NiCd or NiMH cells)
•
0.9V to 4.5V* output voltage
•
Programmable PWM/PSM controls
•
Low output ripple
•
BGA construction
•
Temperature range: - 40°C to + 85°C
•
No external components required
•
Output power 15W
•
Maximum current 4A
•
Low profile
* Note:
For higher output voltage please consult factory at
FunctionPAK@Vishay.com
The DC/DC converter is a programmable topology
synchronized Buck converter for today’s continuous
changing portable electronic market. The DC/DC converter
provides flexibility of utilizing various battery configurations
and chemistries such as NiCd, NiMH, or Li+ with an input
voltage range of 2.5V to 6V. An additional flexibility is
provided with topology programmability to power multiple
loads such as power amplifiers, microcontrollers, or
baseband logic IC’s. For ultra-high efficiency, converters are
designed to operate in synchronous rectified PWM mode
under full load while transforming into externally controlled
pulse-skipping mode (PSM) under light load.
The DC/DC converter is available in 20-ports BGA package.
In order to satisfy the stringent ambient temperature
requirements, the DC/DC converter is designed to handle
the industrial temperature range of - 40°C to + 85°C.
APPLICATION
•
Cordless phones, PDA’s and others
•
Supply voltage source for low-voltage chip sets
•
Point of Load (POL) applications such as drivers for
FPGA’s, microprocessors, DSP’s amplifiers, etc.
•
Portable computers
•
Battery back-up supplies
•
Cameras
ORDERING INFORMATION
FX
FUNCTION
SIZE
CIRCUIT IDENTIFIER
OUTPUT VOLTAGE - Example: 3.3V should be written as 3V3 as the V indicates the decimal point,
or ADJ for adjustable version - self selectable output voltage.
PACKAGING - B1 = 10pcs in bulk; B5 = 50pcs in bulk; T1 = 13” reel; T2 = 7” reel.
For lead (Pb)-free solder please add E2 suffix.
5545
G108
Document Number: 10131
Revision: 21-Jan-05
For technical questions, contact FunctionPAK@vishay.com
For marketing questions, contact FunctionPAK.marketing@vishay.com
www.vishay.com
39
FX5545G108
Vishay
DIMENSIONS
in inches [millimeters]
A
C
A
L
W
A
B
C
T
Ball Diameter
0.58 ± 0.01
[14.7 ± 0.25]
0.48 ± 0.01
[12.2 ± 0.25]
0.1 ± 0.01
[2.54 ± 0.25]
0.09 ± 0.01
[2.29 ± 0.25]
0.09 ± 0.01
[2.27 ± 0.25]
0.126 max
[3.2 max]
0.03 ± 0.001
[0.762 ± 0.025]
T
W
PIN CONFIGURATION*
BOTTOM SIDE
PIN
1, 2
20 19 18 17
16 15 14 13
12 11 10 9
8
4
7
3
6
2
5
1
B
CONNECTION
SD
SYNC**
N/C
Vin
PWM/PSM
N/C
GND
Vout
N/C
GND
3, 7
Marked on Upper Side
4, 8
5, 9
6, 10
11, 12
13, 17
Note: * Pin Description application note is available at
www.vishay.com/doc?10119
For adjustable version please refer to Self Selectable Output Voltage
application note which is available at www.vishay.com/doc?10116
Note: ** If not used must be connected to Vin.
14, 18
15, 19
16, 20
RECOMMENDED PAD PATTERN
in inches [millimeters]
D
A
D
F
A
0.1 ± 0.01
[2.54 ± 0.25]
0.03 ± 0.001
[0.8 ± 0.02]
0.02 ± 0.001
[0.5 ± 0.02]
F
1 A
TAPE AND REEL
See Tape and Reel Information - Type B
www.vishay.com
40
For technical questions, contact FunctionPAK@vishay.com
For marketing questions, contact FunctionPAK.marketing@vishay.com
Document Number: 10131
Revision: 21-Jan-05
FX5545G108
Vishay
Rise Time
Fall Time
Rise Time (PWM mode): Vin = 6V; Vout = 3.3V; lout = 4A
Fall Time (PWM mode): Vin = 6V; Vout = 3.3V; lout = 4A
Fall Time (PWM mode): Vin = 6V; Vout = 3.3V; lout = 1A
Fall Time (PWM mode): Vin = 6V; Vout = 3.3V; lout = 1A
Rise Time (PWM mode): Vin = 4V; Vout = 3.3V; lout = 4A
Fall Time (PWM mode): Vin = 4V; Vout = 3.3V; lout = 4A
Rise Time (PWM mode): Vin = 4V; Vout = 3.3V; lout = 1A
www.vishay.com
42
Fall Time (PWM mode): Vin = 4V; Vout = 3.3V; lout = 1A
Document Number: 10131
Revision: 21-Jan-05
For technical questions, contact FunctionPAK@vishay.com
For marketing questions, contact FunctionPAK.marketing@vishay.com
FX5545G108
Vishay
PWM MODE
Vout Vs. lout*
Vin = 4V
3.5
3.45
3.4
3.35
3.3
3.25
3.2
3.15
3.1
3.05
3
3.5
3.45
3.4
3.35
3.3
3.25
3.2
3.15
3.1
3.05
3
3
3.5
4
4.5
5
5.5
6
Vout Vs. Vin*
Vout (V)
0
0.5
1
1.5
2
2.5
3
3.5
4
Vout (V)
lout = 1A
lout = 3A
lout = 4A
4.5
6.5
7
7.5
lout (A)
Vin (V)
∆Temp
Vs. lout*
Above 25°C Ambient Temperature
Vin = 6.0V; Vout = 3.3V
100
90
80
70
60
50
40
30
20
10
0
0
0.5
1
1.5
2
lout (A)
2.5
3
3.5
4
4.5
100
95
90
85
80
75
70
65
60
0
Efficiency Vs. lout*
Vout = 3.3V
Efficiency (%)
∆Temp
(°C)
Vin = 4.0V
Vin = 5.0V
0.5
1
1.5
2
2.5
3
3.5
4
4.5
lout (A)
Vout Vs lout*
Vin = 4V
1.5
1.45
1.4
1.35
1.3
1.25
1.2
1.15
1.1
1.05
1
1.5
1.45
1.4
1.35
1.3
1.25
1.2
1.15
1.1
1.05
1
2
2.5
Vout Vs. Vin*
Vout (V)
Vout (V)
lout = 1A
lout = 3A
lout = 4A
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
3
3.5
4
4.5
5
5.5
6
6.5
lout (V)
Vin (V)
∆Temp
Vs. lout*
Above 25°C Ambient Temperature
Vin = 6.0V; Vout = 1.2V
100
90
80
70
60
50
40
30
20
10
0
100
90
Efficiency Vs. lout*
Vout = 1.2V
Efficiency (%)
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
80
70
60
50
40
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
∆
Temp (°C)
lout (A)
lout (A)
*Note: Measurements were taken with Power supply: ZUP 20-40 from Nemic Lambda; Electronic load: 6063B from Agilent; Multimeter: Fluke 45
from Fluke and 34401 digital multimeter from Agilent; Scope: Infiniium 54815A from Agilent.
Document Number: 10131
Revision: 21-Jan-05
For technical questions, contact FunctionPAK@vishay.com
For marketing questions, contact FunctionPAK.marketing@vishay.com
www.vishay.com
43
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