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FX5545G305
Vishay
Industry Smallest and Low Profile 10W 3.0A 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 380W/inch3 * 1A 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: - 40C to + 85C * No external components needed * Output power 10W * Maximum current 3.0A * 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 synchronous 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 - 40C to + 85C.
*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 lead (Pb)-free solder please add E2 suffix. Document Number: 10115 Revision: 21-Jan-05 For technical questions, contact FunctionPAK@vishay.com For marketing questions, contact FunctionPAK.marketing@vishay.com www.vishay.com 65 5545 G305
FX5545G305
Vishay
DIMENSIONS in inches [millimeters]
A L C A
L W A B C T Ball Diameter 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] 0.03 0.001 [0.762 0.025]
BOTTOM SIDE
PIN CONFIGURATION*
PIN
20 19 18 17 16 15 14 13 12 11 10 9 8 4 7 3 6 2 5 1
T
CONNECTION SD SYNC** N/C Vin PWM/PSM N/C GND Vout N/C GND
1, 2
Marked on Upper Side
3, 7 4, 8 5, 9 6, 10
*Note: Pin Description application note is available at www.vishay.com/doc?10119 **Note: Pin if not used must be connected to Vin.
11, 12 13, 17 14, 18 15, 19 16, 20
RECOMMENDED PAD PATTERN in inches [millimeters]
A D F
A
D F
0.1 0.01 [2.54 0.25]
0.03 0.001 [0.8 0.02]
0.02 0.001 [0.5 0.02]
A
TAPE AND REEL
See Tape and Reel Information - Type B
www.vishay.com 66
For technical questions, contact FunctionPAK@vishay.com For marketing questions, contact FunctionPAK.marketing@vishay.com
Document Number: 10115 Revision: 21-Jan-05
B
W
FX5545G305
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: WD = Power Dissipated C C C C/WD* Tj JA - 40 - 55 150 82 + 85 + 125 KHz FSYNC/FOSC 1.2 400 1.5 gr. 1.4 W VDC % %/C mVpp DC to 20 MHz 150 at 25 C Ambient Temperature -3 10 1.35 to 4.5 +3 0.03 VAC nA 60Hz 60sec VISO = 500 VDC VISO = 500 VDC 750 1 x 1011 5 V V A A A ms VH VL IDD IDD IDD TSS 4 2.4 0.8 750 250 1 VDC A ms PSM mode TSS 2.7 200 4 6 UNIT CONDITION MIN TYP MAX
Rise Time
Fall Time
Rise Time (PWM mode): Vin = 6V; Vout = 3.3V; lout = 3A Document Number: 10115 Revision: 21-Jan-05
Fall Time (PWM mode): Vin = 6V; Vout = 3.3V; lout = 3A www.vishay.com 67
For technical questions, contact FunctionPAK@vishay.com For marketing questions, contact FunctionPAK.marketing@vishay.com
FX5545G305
Vishay
PWM MODE Vout Vs. lout*
Vin = 3.6V
2.6 2.55 2.6 2.55 2.5 Iout = 1.5A Iout = 0.5A Iout = 3.0A
Vout Vs. Vin*
Vout (V)
2.5 2.45 2.4 2.35 2.3 0 1 2 3 4
Vout (V)
2.45 2.4 2.35 2.3 0 2 4 6 8
lout (A)
Vin (V)
Temp. Vs. lout*
Above 25C Ambient Temperature; For Vin = 5V
90 80 70 100 95 90 85 80 75 70 65 60 55 50
Efficiency Vs. lout*
Vin = 3.6V; Vout = 2.5V
D Temp (C)
60 50 40 30 20 10 0
0
1
2
3
4
Efficiency (%)
0
1
2
3
4
lout (A)
lout (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 0.25
Vout Vs. lout*
Vin = 6V
Vout (V)
Efficiency Vs. lout*
100 90 80 70 60 50 40 30 20 10 0 0 Vin = 4V Vin = 6V
Efficiency (%)
0.05
0.1 Iout (A)
0.15
Vout (V)
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 68 For technical questions, contact FunctionPAK@vishay.com For marketing questions, contact FunctionPAK.marketing@vishay.com Document Number: 10115 Revision: 21-Jan-05

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