FX5545G205
Vishay
Industry Smallest and Low Profile
8W 2.5A DC/DC Buck Converter
with High Output Power Density
FEATURES
•
Fully integrated DC/DC converter
•
High efficiency over large load range
•
100% duty cycle
•
Power density - more than 300W/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
•
Programmable PWM/PSM controls
•
Low output ripple
•
BGA/LGA construction
•
Temperature range: - 40°C to + 85°C
•
No external components needed
•
Output power 8W
•
Maximum current 2.5A
•
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 2.7V 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.
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 lead (Pb)-free solder please add E2 suffix.
Document Number: 10113
Revision: 21-Jan-05
For technical questions, contact FunctionPAK@vishay.com
For marketing questions, contact FunctionPAK.marketing@vishay.com
www.vishay.com
53
5545
G205
FX5545G205
Vishay
STANDARD ELECTRICAL SPECIFICATIONS
PARAMETER
Input
Voltage Range
Quiescent Current
Soft Start Time
SD, PWM/PSM,SYNC
Logic High
Logic Low
Normal Mode
PSM Mode
Shutdown Mode
Shutdown Time
Insulation
Test Voltage
Resistance
Leakage Current
Output
Power
Voltage
Voltage Tolerance
Temp. Coefficient
Ripple and Noise
General
Package Weight
Oscillator
Frequency
SYNC Range
Temperature
Operation
Storage
Operating Junction Temp.
Thermal Impedance
*Note:
W
D
= Power Dissipated
°C
°C
°C
°C/W
D
*
T
j
θ
JA
- 40
- 55
150
82
+ 85
+ 125
KHz
F
SYNC
/F
OSC
1.2
400
1.5
gr.
1.4
W
V
DC
%
%/°C
mVpp
mVpp
DC to 20 MHz
with 10µF output capacitor
130
90
at 25 °C Ambient Temperature
-3
8
1.35 to 4.5
+3
0.03
V
AC
Ω
nA
60Hz 60sec
V
ISO
= 500 V
DC
V
ISO
= 500 V
DC
750
1 x 10
11
5
V
V
µA
µA
µA
ms
V
H
V
L
I
DD
I
DD
I
DD
T
SS
1
2.4
0.8
750
250
1
V
DC
µA
ms
PSM mode
T
SS
2.7
200
3.5
6
UNIT
CONDITION
MIN
TYP
MAX
Rise Time
Fall Time
Rise Time (PWM mode): Vin = 6V; Vout = 3.3V; lout = 2.5A
Document Number: 10113
Revision: 21-Jan-05
Fall Time (PWM mode): Vin = 6V; Vout = 3.3V; lout = 2.5A
www.vishay.com
55
For technical questions, contact FunctionPAK@vishay.com
For marketing questions, contact FunctionPAK.marketing@vishay.com
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