FX5545G001
Vishay
Industry Smallest and Lowest Profile
Synchronous 1.5W 0.6A DC/DC
Buck Converter with High Output Power Density
FEATURES
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Fully integrated DC/DC converter
High efficiency over large load range
2MHz switching frequency
100% duty cycle
Power density - more than 80W/inch
3
1µA shutdown current
2.7V to 6V input range (1Li+ and 3-cell NiCd or NiMH cells)
1.35V to 4.5V* output voltage with max output current of
600mA
Programmable PWM/PSM controls
Low output ripple
BGA/LGA construction
Temperature range: - 40°C to + 85°C
No external components needed
Low profile
UL certified
Note:
For higher output voltage please
consult factory at FunctionPAK@Vishay.com
The DC/DC converter provides fully integrated synchronous
buck converter solution for the latest one-cell lithium ion
cellular phones. Its input voltage is between 2.7V to 6V,
capable of delivering 600mA of output current at 1.5V to 3.6V.
The DC/DC converter combines the 2MHz-switching
controller with fully integrated passive components needed
to deliver the smallest and most efficient converter available
today. The high switching frequency minimizes the output
capacitance with peak to peak output ripple as low as 20mV.
The DC/DC converter delivers efficiency up to 95%. The
programmable pulse-skipping mode (PSM) maintains this
high efficiency even during the standby and idle modes to
increase overall battery life and talktime. In order to extract
the last ounce of power from the battery, the DC/DC
converter is designed with 100% duty cycle control for this
mode. This function enables the DC/DC converter to operate
like a saturated linear regulator delivering the highest
potential output voltage for longer talk time.
The DC/DC converter is available in 20-ports BGA/LGA
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
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Point of Load (POL) applications such as drivers for
FPGA’s, microprocessors, DSP’s amplifiers, etc.
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Cellular and cordless phones, PDAs and others
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Supply voltage source for low voltage chip sets
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Portable computers
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Battery back-up supplies
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Digital cameras
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Routers
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Fiber optics
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LANS
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Image processing
ORDERING INFORMATION
FX
FUNCTIONPAK
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 lead (Pb)-free solder please add E2 suffix.
Document Number: 10101
Revision: 25-Jul-05
For technical questions, contact FunctionPAK@vishay.com
For marketing questions, contact FunctionPAK.marketing@vishay.com
www.vishay.com
5
5545
G001
FX5545G001
Vishay
STANDARD ELECTRICAL SPECIFICATIONS
PARAMETER
Input
Voltage Range
Insulation
Test Voltage
Resistance
Leakage Current
Output
Power
Voltage
Voltage Tolerance
Temp. Coefficient
Ripple and Noise
General
Switching Frequency
Package Weight
Temperature
Operation
Storage
UNIT
V
DC
V
AC
Ω
nA
W
V
DC
%
%/°C
mVpp
MHz
gr.
°C
°C
- 40
- 55
60 Hz 60 sec
V
ISO
= 500V
DC
V
ISO
= 500V
DC
CONDITION
MIN
2.7
750
1 x 10
11
TYP
MAX
6
5
1.5
1.35 to 4.5
at 25°C Ambient Temperature
DC to 20MHz
-3
15
2
0.9
+ 85
+ 125
3
0.03
30
Vout Vs. Iout (Typ)*
Vin = 3.6V; Vout = 2.7V
2.8
2.75
2.7
Vout Vs. Vin (Typ)*
Iout=300mA
Iout=100mA
Vout (V)
2.65
2.6
2.55
2.5
2
3
4
Vin (V)
5
6
7
Δ
Temp Vs. Iout*
Above 25 °C Ambient Temperature
30
25
20
15
10
5
0
Vin=6v
Efficiency Vs. Iout (Typ)*
Vin = 3.6V; Vout = 2.7V
D
Temp (°C)
Vin=3.6v
0
0.2
0.4
Iout (A)
0.6
*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: 10101
Revision: 25-Jul-05
For technical questions, contact FunctionPAK@vishay.com
For marketing questions, contact FunctionPAK.marketing@vishay.com
www.vishay.com
7
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