TPS40170_15 Datasheet, PDF (6/47 Pages) Texas Instruments – TPS40170 4.5 V to 60 V Wide Input Synchronous PWM Buck Controller

TPS40170
SLUS970B – NOVEMBER 2013 – REVISED DECEMBER 2014
Electrical Characteristics (continued)
Unless otherwise stated, these specifications apply for -40ºC ≤ T_J ≤ 125ºC, V_VIN=12 V
PARAMETER
TEST CONDITIONS
D_MAX ⁽¹⁾
Maximum duty cycle
ERROR AMPLIFIER
f_SW = 100 kHz, 4.5 V < V_IN ≤ 60 V
F_SW = 300 kHz, 4.5 V < V_IN ≤ 60 V
f_SW = 600 kHz, 4.5 V < V_IN ≤ 60 V
GBWP ⁽²⁾
Gain bandwidth product
A_OL ⁽²⁾
Open-loop gain
I_IB
Input bias current
I_EAOP
Output source current
I_EAOM
Output sink current
PROGRAMMABLE SOFT-START
V_FB = 0 V
V_FB = 1 V
I_{SS(source,start)}
I_{SS(source,normal)}
I_SS(sink)
V_SS(fltH)
Soft-start source current at V_SS < 0.5 V
Soft-start source current at V_SS > 0.5 V
Soft-start sink current
SS pin HIGH voltage during fault (OC or thermal) reset
timing
V_SS = 0.25 V
V_SS = 1.5 V
V_SS = 1.5 V
V_SS(fltL)
SS pin LOW voltage during fault (OC or thermal) reset
timing
V_{SS(steady_state)}
V_SS(offst)
TRACKING
SS pin voltage during steady-state
Initial offset voltage from SS pin to error amplifier input
V_TRK(ctrl) ⁽²⁾
Range of TRK which overrides V_REF
SYNCHRONIZATION (MASTER/SLAVE)
4.5 V < V_IN ≤ 60 V
V_MSTR
M/S pin voltage in master mode
V_SLV(0)
M/S pin voltage in slave 0 deg mode
V_SLV(180)
M/S pin voltage in slave 180 deg mode
I_SYNC(in)
SYNC pin pull-down current
V_{SYNC(in_high)} SYNC pin input high-voltage level
V_{SYNC(in_low)} SYNC pin input low-voltage level
t_{SYNC(high_min)} Minimum SYNC high pulse-width
t_{SYNC(low_min)} Minimum SYNC low pulse-width
GATE DRIVERS
M/S configured as slave- 0 degrees or
slave-180 degrees
R_HDHI
High-side driver pull-up resistance
R_HDLO
High-side driver pull-down resistance
R_LDHI
Low-side driver pull-up resistance
R_LDLO
Low-side driver pull-down resistance
t_NON-OVERLAP1 Time delay between HDRV fall and LDRV rise
t_NON-OVERLAP2 Time delay between HDRV rise and LDRV fall
OVERCURRENT PROTECTION (LOW-SIDE MOSFET SENSING)
C_LOAD = 2.2 nF, I_DRV = 300 mA
C_LOAD = 2.2 nF,
V_HDRV = 2 V, V_LDRV = 2 V
I_ILIM
I_ILIM,(ss)
I_ILIM,
(2)
Tc
V_ILIM ⁽²⁾
OCP_TH
ILIM pin source current
ILIM pin source current during Soft-start
Temperature coefficient of ILIM current
ILIM pin voltage operating range
Overcurrent protection threshold (Voltage across low-
side FET for detecting overcurrent)
SHORT CIRCUIT PROTECTION HIGH-SIDE MOSFET SENSING)
4.5 V < V_IN < 60 V, T_J = 25°C
4.5 V < V_IN < 60 V
4.5 V < V_IN < 60 V
R_ILIM = 10 kΩ, I_ILIM = 10 µA
(V_ILIM = 100 mV)
V_LDRV(max)
A_OC3
A_OC7
A_OC15
LDRV pin maximum voltage during calibration
Multiplier factor to set the SCP based on OCP level
setting at the ILIM pin
R_LDRV = open
R_LDRV = 10 kΩ
R_LDRV = open
R_LDRV = 20 kΩ
(2) Specified by design. Not production tested.
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MIN
95%
91%
82%
TYP MAX
UNIT
7 10 13 MHz
80 90 95
dB
100
nA
2
mA
2
42 52 62
9.3 11.6 13.9
µA
0.77 1.05 1.33
2.38 2.50 2.61
V
235 300 375 mV
3.25 3.30 3.50
V
525 650 775 mV
0
600 mV
3.9
VIN
1.25
1.75
V
0
0.75
8 11 14
µA
2
V
0.8
40 50
ns
40 50
1.37 2.64 3.50
1.08 2.40 3.35
Ω
1.37 2.40 3.20
0.44 1.10 1.70
50
ns
60
9.00 9.75 10.45
µA
15
1400
ppm
50
300
mV
–110 –100 –84
300 360 mV
2.75 3.20 3.60
6.40 7.25 7.91 V/V
13.9 16.4 18.0
6
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