For technical questions, contact FunctionPAK@vishay.com
For marketing questions, contact FunctionPAK.marketing@vishay.com
Document Number: 10106
Revision 18-Apr-02
www.vishay.com
10
FX5545G101
Vishay
FEATURES
• Fully integrated DC/DC converter
• Adjustable output voltage between 1.5V to 3.6V by an
external resistor
• High efficiency over large load range
• 2MHz switching frequency
• 100% duty cycle
• Power density - more than 80W/inch3
• 1uA shutdown current
• 2.7V to 6V input range (1Li+ and 3-cell NiCd or NiMH cells)
• 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
The DC/DC converter provides fully integrated synchronous
buck converter solution for the latest one-cell lithium ion cellu-
lar phones. Its input voltage is between 2.7V to 6V, capable of
delivering up to 600mA of output current, an output voltage
between 1.5V to 3.6V can be adjusted an external resistor
according to the formula:
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 25mV.
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
FX 5545 G101
FUNCTION
SIZE
SERIAL NUMBER
PACKAGING-B1 = 10pcs in bulk; B5 = 50pcs in bulk; T1 = 13” reel; T2 = 7” reel.
ORDERING INFORMATION
APPLICATION
• Cordless phones, PDAs and others
• Supply voltage source for low voltage chip sets
• Portable computers
• Battery back-up supplies
• Cameras
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 pack-
age. In order to satisfy the stringent ambient temperature re-
quirements, the DC/DC converter is designed to handle the
industrial temperature range of - 40°C to + 85°C.
Industry Smallest and Low Profile DC/DC Buck Converter
with High Output Density Power
with an Adjustable Output Voltage
REXT [KΩ] = 28.6 [KΩ]
Vout - 1.3
For technical questions, contact FunctionPAK@vishay.com
For marketing questions, contact FunctionPAK.marketing@vishay.com
www.vishay.com
11
FX5545G101
Vishay
Document Number: 10106
Revision 18-Apr-02
DIMENSIONS in inches [millimeters]
T
A
C
L
B
A
W
L0.58 ± 0.01
[14.7 ± 0.25]
W0.48 ± 0.01
[12.2 ± 0.25]
A0.1 ± 0.01
[2.54 ± 0.25]
B0.09 ± 0.01
[2.29 ± 0.25]
C0.09 ± 0.01
[2.27 ± 0.25]
T0.071 ± 0.004
[1.8 ± 0.1]
T1 0.022
[0.55]
Marked on Upper Side
AD F
0.1 ± 0.01 0.03 ± 0.002 0.02 ± 0.002
[2.54 ± 0.25] [0.8 ± 0.05] [0.5 ± 0.05]
RECOMMENDED PAD PATTERN in inches [millimeters]
PIN CONNECTION
1, 2 SD
3, 7 SYNC
4, 8 N/C
5, 9 Vin
6, 10 PWM/PSM
11, 12 N/C
13, 17 GND
14, 18 Vout
15, 19 Ext. Resistor
16, 20 GND
PIN CONFIGURATION
BOTTOM SIDE
20 19 18 17
16 15 14 13
12 11 10 9
8 7 6 5
4 3 2 1
SD
PWM/PSMSYNC
Vin Vout
GND
BGA
T1
T
LGA
A
D
F
A
See Tape and Reel Information - Type A
TAPE AND REEL
For technical questions, contact FunctionPAK@vishay.com
For marketing questions, contact FunctionPAK.marketing@vishay.com
Document Number: 10106
Revision 18-Apr-02
www.vishay.com
12
FX5545G101
Vishay
PARAMETER UNIT CONDITION MIN TYP MAX
Input
Voltage Range VDC 2.7 6
Insulation
Test Voltage VAC 60Hz 60sec 750
Resistance ΩVISO = 500VDC 1 x 1011
Leakage Current nA VISO = 500VDC 5
Output
Power W 1.5
Voltage VDC 1.5 to 3.6
Temp. Coefficient %/°C0.03
Ripple and Noise mVpp DC to 20MHz 15 30
General
Switching Frequency MHz 2
Package Weight gr. 0.9
Temperature
Operation °C - 40 + 85
Storage °C - 55 + 125
STANDARD ELECTRICAL SPECIFICATIONS
Vout Vs. Iout (Typ)
Vin = 3.6V; Ext Resistor = 20k; Vout = 2.7V
Vout Vs. Vin (Typ)
Ext Resistor = 20k;
∆ Temp Vs. Iout
Above 25°C Ambient Temperature
Efficiency Vs. Iout
Vin = 3.6V; Ext Resistor = 20k; Vout = 2.7V
Vout (V)
∆ Temp (°C)
Efficiency (%)
Iout (A) Vin (V)
Iout (A)
Iout (A)
Vout (V)
2.5
2.55
2.6
2.65
2.7
2.75
2.8
0 0.2 0.4 0.6
2.5
2.55
2.6
2.65
2.7
2.75
2.8
234567
Iout=100mA
Iout=300mA
Iout=600mA
0
5
10
15
20
25
30
0 0.2 0.4 0.6
Vin=6v
Vin=3.6v
0.8
50
55
60
65
70
75
80
85
90
95
100
0 0.2 0.4 0.6
