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TPS56221 Datasheet(PDF) 6 Page - Texas Instruments

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

TPS56221 Datasheet(HTML) 6 Page - Texas Instruments

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TPS56221
SLUSAH5C – MARCH 2011 – REVISED JANUARY 2015
www.ti.com
Electrical Characteristics (continued)
–40°C
≤ TJ ≤ 125°C, VVDD = 12 V, all parameters at zero power dissipation (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
GBWP (1)
Gain bandwidth product
10
24
MHz
AOL
(1)
Open loop gain
60
dB
Input bias current (current out of
IIB
VFB = 0.6 V
75
nA
FB pin)
IEAOP
Output source current
VFB = 0 V
1.5
mA
IEAOM
Output sink current
VFB = 1 V
1.5
mA
POWER GOOD
Feedback upper voltage limit for
VOV
655
675
700
mV
PGOOD
Feedback lower voltage limit for
VUV
500
525
550
mV
PGOOD
VPGD-HYST
PGOOD hysteresis voltage at FB
30
45
mV
RPGD
PGOOD pull down resistance
VFB = 0 V, IFB = 5 mA
30
70
Ω
550 mV < VFB < 655 mV,
IPGDLK
PGOOD leakage current
10
20
µA
VPGOOD = 5 V
OUTPUT STAGE
RHI
High-side device resistance
TJ = 25°C, (VBOOT– VSW) = 5.5 V
4.5
6.5
m
Ω
RLO
Low side device resistance
TJ = 25°C
1.9
2.7
m
Ω
OVERCURRENT PROTECTION (OCP)
Minimum pulse time during short
tPSSC(min)
(1)
250
circuit
ns
Switch leading-edge blanking pulse
tBLNKH
(1)
150
time (high-side detection)
IOCH
OC threshold for high-side FET
TJ = 25°C, (VBOOT– VSW) = 5.5 V
45
54
65
A
IILIM
ILIM current source
TJ = 25°C
10.0
µA
Programmable OC range for low
VOCLPRO
(1)
TJ = 25°C
12
100
mV
side FET
tOFF
OC retry cycles on EN/SS pin
4
Cycle
BOOT DIODE
VDFWD
Bootstrap diode forward voltage
IBOOT = 5 mA
0.8
V
THERMAL SHUTDOWN
TJSD
(1)
Junction shutdown temperature
145
ºC
TJSDH
(1)
Hysteresis
20
ºC
6
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