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TPS56221 Datasheet(PDF) 3 Page - Texas Instruments

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Part # TPS56221
Description  4.5-V to 14-V Input High-Current Synchronous Buck Converter
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPS56221 Datasheet(HTML) 3 Page - Texas Instruments

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TPS56221
www.ti.com
SLUSAH5
– MARCH 2011
ELECTRICAL CHARACTERISTICS
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
S
VOLTAGE REFERENCE
TJ = 25°C, 4.5 V ≤ VVDD ≤ 14 V
597
600
603
VFB
FB input voltage
mV
–40°C ≤ TJ ≤ 125°C,
594
600
606
4.5 V
≤ VVDD ≤ 14 V
INPUT SUPPLY
VVDD
Input supply voltage range
4.5
14
V
IVDDSD
Shutdown supply current
VEN/SS = 0.2 V
80
120
µA
IVDDQ
Quiescent, non-switching
Let EN/SS float, VFB = 1 V
2.5
5.0
mA
VUVLO
UVLO ON Voltage
4.0
4.3
V
VUVLO(HYS)
UVLO hysteresis
500
700
mV
ENABLE/SOFT-START
VIH
High-level input voltage, EN/SS
0.55
0.70
1.00
V
VIL
Low-level input voltage, EN/SS
0.27
0.30
0.33
V
ISS
Soft-start source current
8
10
12
µA
VSS
Soft-start voltage level
– Start of ramp
0.4
0.8
1.3
V
BP REGULATOR
VBP
Output voltage
IBP = 10 mA
6.2
6.5
6.8
V
VDO
Regulator dropout voltage, VVDD – VBP IBP = 25 mA, VVDD = 4.5 V
70
125
mV
OSCILLATOR
RCOMP = 40.2 kΩ,
270
300
330
kHz
4.5 V
≤ VVDD ≤ 14 V
RCOMP = open,
fSW
Switching Frequency
450
500
550
kHz
4.5 V
≤ VVDD ≤ 14 V
RCOMP = 13.3 kΩ,
0.8
0.95
1.1
MHz
4.5 V
≤ VVDD ≤ 14 V
VRAMP
(1)
Ramp amplitude
VVDD/6.6
VVDD/6 VVDD/5.4
V
PWM
fsw = 300 kHz, VFB = 0 V,
93%
4.5 V
≤ VVDD ≤ 14 V
fsw = 500 kHz, VFB = 0 V,
DMAX
(1)
Maximum duty cycle
90%
4.5 V
≤ VVDD ≤ 14 V
fsw = 1 MHz, VFB = 0 V,
85%
4.5 V
≤ VVDD ≤ 14 V
tON(min)
(1)
Minimum controllable pulse width
100
ns
ERROR AMPLIFIER
GBWP (1)
Gain bandwidth product
10
24
MHz
AOL
(1)
Open loop gain
60
dB
Input bias current (current out of FB
IIB
VFB = 0.6 V
75
nA
pin)
IEAOP
Output source current
VFB = 0 V
1.5
mA
IEAOM
Output sink current
VFB = 1 V
1.5
mA
(1)
Ensured by design. Not production tested
Copyright
© 2011, Texas Instruments Incorporated
3
Product Folder Link(s) :TPS56221


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