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LM5121MHENOPB Datasheet(PDF) 4 Page - Texas Instruments

Part # LM5121MHENOPB
Description  Wide Input Synchronous Boost Controller with Disconnection Switch Control
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LM5121MHENOPB Datasheet(HTML) 4 Page - Texas Instruments

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LM5121/LM5121-Q1
SNVS963A – SEPTEMBER 2013 – REVISED SEPTEMBER 2013
www.ti.com
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, these specifications apply for -40°C
≤ TJ ≤ +125°C, VVIN = 12 V, VVCC = 8.3 V, RT = 20 kΩ, no
load on LO and HO. Typical values represent the most likely parametric norm at TJ = 25°C, and are provided for reference
purposes only.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VIN SUPPLY
ISHUTDOWN VIN shutdown current
VUVLO = 0 V
9
17
µA
IBIAS
VIN operating current (exclude the current
VUVLO = 2 V, non-switching
4
5
mA
into RT resistor)
VCC REGULATOR
VCC(REG)
VCC regulation
No load
6.9
7.6
8.3
VVIN = 4.5 V, no external load
0.25
V
VCC dropout (VIN to VCC)
VVIN = 4.5 V, IVCC = 25 mA
0.28
0.5
VCC sourcing current limit
VVCC = 0 V
50
62
VVCC = 8.3 V
3.5
5
mA
VCC operating current (exclude the current
IVCC
into RT resistor)
VVCC = 12 V
4.5
8
VCC rising, VVIN = 4.5 V
3.9
4.0
4.1
VCC undervoltage threshold
VCC falling, VVIN = 4.5 V
3.7
V
VCC undervoltage hysteresis
0.385
UNDERVOLTAGE LOCKOUT
UVLO threshold
UVLO rising
1.17
1.20
1.23
V
UVLO hysteresis current
VUVLO = 1.4 V
7
10
13
µA
UVLO standby threshold
UVLO rising
0.3
0.4
0.5
V
UVLO standby hysteresis
0.1
0.125
MODE
Diode emulation mode threshold
MODE rising
1.20
1.24
1.28
V
Diode emulation mode hysteresis
0.1
Default MODE voltage
145
155
170
mV
COMP rising, measured at COMP
1.290
Default skip cycle threshold
V
COMP falling, measured at COMP
1.245
Skip cycle hysteresis
Measured at COMP
40
mV
ERROR AMPLIFIER
VREF
FB reference voltage
Measured at FB, VFB= VCOMP
1.188
1.200
1.212
V
FB input bias current
VFB= VREF
5
nA
ISOURCE = 2 mA, VVCC = 4.5 V
2.75
VOH
COMP output high voltage
ISOURCE = 2 mA, VVCC = 12 V
3.40
V
VOL
COMP output low voltage
ISINK = 2 mA
0.25
AOL
DC gain
80
dB
fBW
Unity gain bandwidth
3
MHz
OSCILLATOR
fSW1
Switching frequency 1
RT = 20 kΩ
400
450
500
kHz
fSW2
Switching frequency 2
RT = 10 kΩ
775
875
975
RT output voltage
1.2
RT sync rising threshold
RT rising
2.5
2.9
V
RT sync falling threshold
RT falling
1.6
2.0
Minimum sync pulse width
100
ns
DISCONNECTION SWITCH CONTROL
IDIS-SOURCE
DG current source
UVLO = 2 V, Sourcing
25
uA
IDIS-SINK
DG current sink
Inrush Control, Sinking
67
DG discharge switch RDS-ON
Circuit Breaker
38
Ω
4
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Copyright © 2013, Texas Instruments Incorporated
Product Folder Links: LM5121/LM5121-Q1


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