Datasheet

TPS43330-Q1
TPS43332-Q1
SLVSA82E –MARCH 2011–REVISED APRIL 2013 www.ti.com
DC ELECTRICAL CHARACTERISTICS (continued)
V
IN
= 8 V to 18 V, T
J
= –40°C to 150°C (unless otherwise noted)
NO. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
4.0 Boost Controller
4.1 V
boost7V
Boost V
OUT
= 7 V DIV = low, V
BAT
= 2 V to 7 V 6.8 7 7.3 V
Boost-enable threshold Boost V
OUT
= 7 V, V
BAT
falling 7.5 8 8.5
4.2 V
boost7V-th
Boost-disable threshold Boost V
OUT
= 7 V, V
BAT
rising 8 8.5 9 V
Boost hysteresis Boost V
OUT
= 7 V, V
BAT
rising or falling 0.4 0.5 0.6
4.3 V
boost10V
Boost V
OUT
= 10 V DIV = open, V
BAT
= 2 V to 10 V 9.7 10 10.4 V
Boost-enable threshold Boost V
OUT
= 10 V, V
BAT
falling 10.5 11 11.5
4.4 V
boost10V-th
Boost-disable threshold Boost V
OUT
= 10 V, V
BAT
rising 11 11.5 12 V
Boost hysteresis Boost V
OUT
= 10 V, V
BAT
rising or falling 0.4 0.5 0.6
4.5 V
boost11V
Boost V
OUT
= 11 V DIV = V
REG
, V
BAT
= 2 V to 11 V 10.7 11 11.4 V
Boost-enable threshold Boost V
OUT
= 11 V, V
BAT
falling 11.5 12 12.5
4.6 V
boost11V-th
Boost-disable threshold Boost V
OUT
= 11 V, V
BAT
rising 12 12.5 13 V
Boost hysteresis Boost V
OUT
= 11 V, V
BAT
rising or falling 0.4 0.5 0.6
Boost-Switch Current Limit
4.7 V
DS
Current-limit sensing DS input with respect to PGNDA 0.175 0.2 0.225 V
4.8 t
DS
Leading-edge blanking 200 ns
Gate Driver for Boost Controller
4.9 I
GC1 Peak
Gate-driver peak current 1.5 A
4.10 r
DS(on)
Source and sink driver V
REG
= 5.8 V, I
GC1
current = 200 mA 2 Ω
Gate Driver for PMOS
4.11 r
DS(on)
PMOS OFF 10 20 Ω
4.12 I
PMOS_ON
Gate current V
IN
= 13.5 V, V
GS
= –5 V 10 mA
4.13 t
delay_ON
Turnon delay C = 10 nF 5 10 µs
Boost-Controller Switching Frequency
4.14 f
sw-Boost
Boost switching frequency f
SW_Buck
/ 2 kHz
4.15 D
Boost
Boost duty cycle 90%
Error Amplifier (OTA) for Boost Converters
V
BAT
= 12 V 0.8 1.35
4.16 Gm
BOOST
Forward transconductance mS
V
BAT
= 5 V 0.35 0.65
5.0 Buck Controllers
V
BuckA
or
5.1 Adjustable output-voltage range 0.9 11 V
V
BuckB
Measure FBX pin 0.792 0.8 0.808 V
Internal reference and tolerance
5.2 V
ref, NRM
voltage in normal mode
–1% 1%
Measure FBX pin 0.784 0.8 0.816 V
Internal reference and tolerance
5.3 V
ref, LPM
voltage in low-power mode
–2% 2%
V sense for forward-current limit in
5.4 FBx = 0.75 V (low duty cycle) 60 75 90 mV
CCM
V
sense
V sense for reverse-current limit in
5.5 FBx = 1 V –65 –37.5 –23 mV
CCM
5.6 V
I-Foldback
V sense for output short FBx = 0 V 17 32.5 48 mV
5.7 t
dead
Shoot-through delay, blanking time 20 ns
High-side minimum on-time 100 ns
5.8 DC
NRM
Maximum duty cycle (digitally
98.75%
controlled)
5.9 DC
LPM
Duty cycle, LPM 80%
LPM entry-threshold load current
I
LPM_Entry
as fraction of maximum set load 1% .
(3)
current
5.10
LPM exit-threshold load current as
I
LPM_Exit
fraction of maximum set load
(3)
10%
current
(3) The exit threshold specification is to be always higher than the entry threshold.
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