FX5545G105
Vishay
Industry Smallest and Low Profile
6.5W 2.0A DC/DC Buck Converter
with High Output Density Power
FEATURES
• Fully integrated DC/DC converter
• High efficiency over large load range
• 100% duty cycle
• Power density - more than 240W/inch
3
• 1uA shutdown current
• 2.7V to 6V input range (1Li+ and 3-cell NiCd or NiMH cells)
• 1.35V to 4.5V* output voltage
• Programmable PWM/PSM controls
• Low output ripple
• BGA/LGA construction
• Temperature range: - 40°C to + 85°C
• No external components needed
• Output power 6.5W
• Maximum current 2.0A
• Low profile
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 2.7V 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 sychronous 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.
*Note:
For higher output voltage please consult factory at
FunctionPAK@Vishay.com
APPLICATION
• Point of Load (POL) applications such as drivers for
FPGA’s, microprocessors, DSP’s amplifiers, etc.
• Cordless phones, PDAs and others
• Supply voltage source for low-voltage chip sets
• Portable computers
• Battery back-up supplies
• Cameras
• Routers
• Fiber optics
• LANS
• Image processing
ORDERING INFORMATION
FX
FUNCTION
SIZE
CIRCUIT IDENTIFIER
OUTPUT VOLTAGE-Example: 2.7V should be written as 2V7 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 technical questions, contact FunctionPAK@vishay.com
For marketing questions, contact FunctionPAK.marketing@vishay.com
5545
G105
Document Number: 10114
Revision 08-Dec-03
www.vishay.com
23
FX5545G105
Vishay
PWM MODE
Vout Vs. Iout*
For Vin = 3.6V; Vout = 2.5V
2.6
2.55
2.5
2.6
2.55
2.5
Iout = 1A
Iout = 2A
Iout = 0.5A
Vout Vs. Vin*
Vout (V)
Vout (V)
0
0.5
1
1.5
2
2.5
2.45
2.4
2.35
2.3
2.45
2.4
2.35
2.3
0
2
4
6
8
Iout (A)
Vin (V)
∆
Temp. Vs. Iout*
Above 25°C Ambient Temperature; For Vin = 6V
40
35
30
100
95
90
85
80
75
70
65
60
55
50
0
0.5
1
1.5
2
2.5
0
Efficiency Vs. Iout*
For Vin = 3.6V; Vout = 2.5V
25
20
15
10
5
0
Efficiency (%)
∆
Temp (
°
C)
0.5
1
1.5
2
2.5
Iout (A)
Iout (A)
PSM MODE
Vout Vs. Vin*
lout = 0.1A
3.4
3.38
3.36
3.34
3.32
3.3
3.28
3.26
3.24
3.22
3.2
3
4
5
Vin (V)
6
7
3.4
3.38
3.36
3.34
3.32
3.3
3.28
3.26
3.24
3.22
3.2
0
0.05
0.1
Iout (A)
0.15
0.2
Vout Vs. lout*
Vin = 6V
Vout (V)
Vout (V)
0.25
Efficiency Vs. Iout*
100
90
80
70
60
50
40
30
20
10
0
0
0.05
0.1
Iout (A)
0.15
Vin = 4V
Vin = 6V
Efficiency (%)
0.2
0.25
*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
www.vishay.com
26
For technical questions, contact FunctionPAK@vishay.com
For marketing questions, contact FunctionPAK.marketing@vishay.com
Document Number: 10114
Revision 08-Dec-03
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