TPS65235-1 Datasheet, PDF (5/39 Pages) Texas Instruments – LNB Voltage Regulator With I2C Interface

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6.5 Electrical Characteristics
T_J = –40°C to 125°C, V_IN = 12 V, f_SW = 1 MHz (unless otherwise noted)
PARAMETER
TEST CONDITIONS
INPUT SUPPLY
V_IN
I_DD(SDN)
I_LDO(Q)
UVLO
Input voltage range
Shutdown supply current
LDO quiescent current
V_IN Undervoltage Lockout
VIN
EN = 0
EN = 1, I_O = 0 A, VLNB = 18.2 V
V_IN Rising
Hysteresis
OUTPUT VOLTAGE
V_OUT
Regulated output voltage
I_(OCP)
Fsw
Output short circuit current limit
Boost switching frequency
V_(ctrl) = 1, I_O = 500 mA
V_(ctrl) = 0, I_O = 500 mA
SCL = 1, V_(ctrl) = 1, I_O = 500 mA (Non I²C)
SCL = 1, V_(ctrl) = 0, I_O = 500 mA (Non I²C)
R_(SET) = 200 kΩ, Full temperature
T_J = 25°C
1 MHz
I_(limitsw) ⁽¹⁾
Switching current limit
V_IN = 12 V, V_OUT = 18.2 V, R_(SET) = 200
kΩ
R_{ds(on)_LS}
On resistance of low side FET
V_(drop)
Linear regulator voltage drop-out
I_(cable)
Cable good detection current threshold
I_(rev)
Reverse bias current
I_{(rev_dis)}
Disabled reverse bias current
LOGIC SIGNALS
V_IN = 12 V
I_O = 500 mA, TONEAMP = 0
I_O = 500 mA, TONEAMP = 1
V_IN = 12 V, V_OUT = 13.4 V or 18.2 V
EN = 1, VLNB = 21 V
EN = 0, VLNB = 21 V
V_(EN)
Enable threshold High
Enable threshold Low
I_(EN)
V_{(VCTRL_H)}
V_{(EXTM_H)}
V_{(VCTRL_L)}
V_{(EXTM_L)}
V_OL(FAULT)
TONE
Enable internal pull up current
VCTRL, EXTM Logic threshold level
FAULT output low voltage
V_(EN) = 1.5 V
V_(EN) = 1 V
High level input voltage
Low level input voltage
FAULT open drain, I_OL = 1 mA
f_(tone)
A_(tone)
Tone frequency
Tone amplitude
22 kHz tone output
I_O = 0 mA to 500 mA, C_O = 100 nF,
TONEAMP = 0
I_O = 0 mA to 500 mA, C_O = 100 nF,
TONEAMP = 1
D_(tone)
f_(EXTM)
Tone duty cycle
External tone input frequency range
22 kHz tone output
44 kHz tone output
TONE DETECTION
f_(DIN)
Tone detector frequency capture range 0.4 V_PP sine wave
V_(DIN)
Tone detector input amplitude
Sine wave, 22 kHz
V_(DOUT)
DOUT output voltage
Tone present, I_load = 2 mA
GDR
Bypass FET gate voltage/LNB
TONE_TRANS = 1, V_(LNB) = 18.2 V
TONE_TRANS = 0, V_(LNB) = 18.2 V
THERMAL SHUT-DOWN (JUNCTION TEMPERATURE)
T_(TRIP)
T_(HYST)
Thermal protection trip Point
Thermal protection hysteresis
Temperature Rising
(1) Lab test data
Copyright © 2017, Texas Instruments Incorporated
Product Folder Links: TPS65235-1
TPS65235-1
SLVSDP1 – JANUARY 2017
MIN
4.5
90
1.5
4.15
280
18
13.25
19.18
14.44
580
629
977
2.4
90
0.44
0.55
0.9
49
3.72
1.6
5
2
2
20
667
753
45%
17.6
35.2
17.6
0.3
23.11
18.17
TYP
12
120
5
4.3
480
18.2
13.4
19.4
14.6
650
650
1060
3
140
0.7
0.8
5
58
4.6
6
3
22
700
800
50%
22
44
22
23.5
18.2
160
20
MAX UNIT
20
V
150
µA
8.5
mA
4.45
V
550
mV
18.4
V
13.55
V
19.62
V
14.76
V
720
mA
688
mA
1134
kHz
3.6
A
210
mΩ
1
V
1.12
V
8.8
mA
65
mA
5.63
mA
V
0.8
V
7
µA
4
µA
V
0.8
V
0.4
V
24
kHz
746
mV
853
mV
55%
26.4
kHz
52.8
kHz
26.4
kHz
1.5
V
0.4
V
24.03
V
18.23
V
°C
°C
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