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TPS40322 Datasheet(PDF) 30 Page - Texas Instruments

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Part No. TPS40322
Description  Dual Output or Two-Phase Synchronous Buck Controller
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPS40322 Datasheet(HTML) 30 Page - Texas Instruments

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TPS40322
SLUSAF8
– JUNE 2011
www.ti.com
TPS40322 Design Example 2
Two-Phase Single Output Configuration from 12-V nominal to 1.2-V DC-to-DC Converter Using
the TPS40322
The following example shows the schematic, waveforms, and components for a two-phase single output
synchronous buck converter using the TPS40322 controller. The design goal parameters are given in Table 5.
Table 5. TPS40322 Design Example Specification
PARAMETER
TEST CONDITION
MIN
NOM
MAX
UNIT
VIN
Input voltage
4.5
15
V
VOUT
Output voltage
IOUT(min) ≤ IOUT ≤ IOUT(max)
1.2
V
Line regulation
VIN(min) ≤ VIN ≤ VIN(max)
0.5%
Load regulation
IOUT(min) ≤ IOUT ≤ IOUT(max)
0.5%
VRIPPLE
Output ripple
IOUT1 = IOUT1(max)
12
mV
VOVER
Output overshoot
ΔIOUT1 = 5 A
40
mV
VUNDER
Output undershoot
ΔIOUT1 = 5A
40
mV
IOUT
Output current
VIN(min) ≤ VIN ≤ VIN(max)
0
10
A
tSS
Soft-start time
VIN = 12 V
2
ms
η
Efficiency
VIN = 12 V, IOUT1= IOUT2 = 10 A
88%
fSW
Switching frequency
500
kHz
30
Copyright
© 2011, Texas Instruments Incorporated


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