FX5545G008
Vishay
Low Profile 3mm DC/DC Buck Coverter
0.8V to 1.2V, 3A with 380W/in
3
Density Power
Efficiency up to 91%
FEATURES
• Fully integrated DC/DC converter
• Advanced development of FX5545G305
• High efficiency over large load range
• 100% duty cycle
• Power density - more than 380W/inch
3
• 1uA shutdown current
• 2.5V to 6V input range (1Li+ and 3-cell NiCd or NiMH cells)
• 0.8V to 1.2V output voltage
• Programmable PWM/PSM controls
• Low output ripple
• BGA construction
• Temperature range: - 40°C to + 85°C
• No external components required
• Output power 3.6W
• Maximum current 3A
• 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 2.5V 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 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.
APPLICATIONS
• Cordless phones, PDAs 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: 1.2V should be written as 1V2 as the V indicates the decimal point.
5545
G008
PACKAGING - B1 = 10pcs in bulk; B5 = 50pcs in bulk; T1 = 13” reel; T2 = 7” reel
www.vishay.com
20
For technical questions, contact FunctionPAK@vishay.com
For marketing questions, contact FunctionPAK.marketing@vishay.com
Document Number: 10126
Revision 13-May-03
FX5545G008
Vishay
B
C
A
DIMENSIONS
in inches [millimeters]
L
W
A
B
C
T
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]
0.12 max
[3 max]
BOTTOM SIDE
W
PIN CONFIGURATION*
PIN
1, 2
3, 7
4, 8
5, 9
6, 10
11, 12
13, 17
14, 18
15, 19
16, 20
CONNECTION
SD
SYNC**
Vref***
Vin
PWM/PSM
N/C
GND
Vout
N/C
GND
20 19 18 17
16 15 14 13
12 11 10
8
4
7
3
6
2
9
5
1
Marked on Upper Side
Note:
*See
Pin Description application note Document Number 10119.
**If
not used must be connected to Vin.
***N/C - If the output voltage is 0.9V and higher. For output
voltage of 0.8V connect Vref to MCL4448 (Vishay RF PIN Diode).
Pin Configuration for Vo = 0.8V
Pin Configuration for Vo = 0.9V - 1.2V
RECOMMENDED PAD PATTERN
in inches [millimeters]
A
0.1
±
0.01
[2.54
±
0.25]
D
0.03
±
0.001
[0.8
±
0.02]
F
T
L
D
A
0.02
±
0.001
[0.5
±
0.02]
F
1
A
TAPE AND REEL
See Tape and Reel Information - Type B
Document Number: 10126
Revision 13-May-03
For technical questions, contact FunctionPAK@vishay.com
For marketing questions, contact FunctionPAK.marketing@vishay.com
A
www.vishay.com
21
FX5545G008
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
UNIT
CONDITION
MINIMUM
TYPICAL
MAXIMUM
V
DC
µA
ms
2.5
PSM mode
T
SS
V
H
V
L
I
DD
I
DD
I
DD
T
SS
60Hz 60sec
V
ISO
= 500V
DC
V
ISO
= 500V
DC
2.4
200
6
6
V
V
µA
µA
µA
s
0.8
750
250
1
700
V
AC
Ω
nA
750
1 x 10
11
5
W
V
DC
%
%/°C
mVpp
3.6
0.8 to 1.2
at 25°C Ambient Temperature
DC to 20MHz
-3
80
+3
0.03
gr.
1.5
KHz
F
SYNC
/F
OSC
°C
°C
°C
°C/W
D
*
1.2
670
1.5
- 40
- 55
Tj
θ
JA
150
82
+ 85
+ 125
Rise Time
Fall Time
Rise Time (PWM mode): Vin = 6V; Vout = 1.2V; Iout = 3A
Fall Time (PWM mode): Vin = 6V; Vout = 1.2V; Iout = 3A
www.vishay.com
22
For technical questions, contact FunctionPAK@vishay.com
For marketing questions, contact FunctionPAK.marketing@vishay.com
Document Number: 10126
Revision 13-May-03
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