TPS7A49_15 Datasheet, PDF (6/34 Pages) Texas Instruments – TPS7A49 36-V, 150-mA, Ultralow-Noise, Positive Linear Regulator

TPS7A49
SBVS121E – AUGUST 2010 – REVISED MAY 2015
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6.4 Thermal Information
TPS7A49
THERMAL METRIC⁽¹⁾
DGN
(HVSSOP PowerPAD) DRB (VSON)
UNIT
8 PINS
8 PINS
R_θJA
R_θJC(top)
R_θJB
ψ_JT
ψ_JB
R_θJC(bot)
Junction-to-ambient thermal resistance
Junction-to-case(top) thermal resistance
Junction-to-board thermal resistance
Junction-to-top characterization parameter
Junction-to-board characterization parameter
Junction-to-case(bottom) thermal resistance
63.4
47.7
°C/W
53
55.3
°C/W
37.4
23.3
°C/W
3.7
1.1
°C/W
37.1
23.5
°C/W
13.5
7.0
°C/W
(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.
6.5 Electrical Characteristics
At T_J = –40°C to 125°C, V_IN = V_OUT(nom) + 1 V or V_IN = 3 V (whichever is greater), V_EN = V_IN, I_OUT = 1 mA, C_IN = 2.2 μF, C_OUT =
2.2 μF, C_NR/SS = 0 nF, and the FB pin tied to OUT, unless otherwise noted. Typical values are at T_A = 25°C.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
V_IN
V_REF
V_FB
V_OUT
Input voltage range
Internal reference⁽¹⁾
Feedback voltage
Output voltage range⁽²⁾
Nominal accuracy
Overall accuracy
DV_OUT(DV_IN)
V_OUT(NOM)
Line regulation
T_J = 25°C, V_NR/SS = V_REF
V_IN ≥ V_OUT(nom) + 1 V
T_J = 25°C, V_IN = V_OUT(nom) + 0.5 V
V_OUT(nom) + 1 V ≤ V_IN ≤ 35 V,
1 mA ≤ I_OUT ≤ 150 mA
T_J = 25°C, V_OUT(nom) + 1 V ≤ V_IN ≤ 35 V
3
1.176
V_REF
–1.5
–2.5
1.188
1.185
0.086
35
1.212
33
1.5
V
V
V
V
%V_OUT
2.5 %V_OUT
%V_OUT
DV_OUT(DI_OUT)
V_OUT(NOM)
Load regulation
T_J = 25°C, 1 mA ≤ I_OUT ≤ 150 mA
0.04
%V_OUT
V_DO
Dropout voltage
I_LIM
Current limit
I_GND
Ground current
I_SHDN
I_FB
Shutdown supply current
Feedback current⁽³⁾
I_EN
Enable current
V_EN(high) Enable high-level voltage
V_EN(low) Enable low-level voltage
V_n
Output noise voltage
V_IN = 95% V_OUT(nom), I_OUT = 100 mA
V_IN = 95% V_OUT(nom), I_OUT = 150 mA
V_OUT = 90% V_OUT(nom)
I_OUT = 0 mA
I_OUT = 100 mA
V_EN = 0.4 V
V_EN = V_IN = V_OUT(nom) + 1 V
V_EN = V_IN = 35 V
V_IN = 3 V, V_OUT(nom) = V_REF, C_OUT = 10 μF,
C_NR/SS = 10 nF, BW = 10 Hz to 100 kHz
V_IN = 6.2 V, V_OUT(nom) = 5 V, C_OUT = 10 μF,
C_NR/SS = C_FF(4) = 10 nF, BW = 10 Hz to
100 kHz
260
333
220
309
49
800
0.8
3
0.02
0.2
2.1
0
15.4
21.15
mV
600 mV
500 mA
100 μA
μA
3 μA
100 nA
1 μA
1 μA
V_IN
V
0.4 V
μV_RMS
μV_RMS
PSRR
T_sd
T_J
Power-supply rejection ratio
Thermal shutdown temperature
Operating junction temperature
V_IN = 6.2 V, V_OUT(nom) = 5 V, C_OUT = 10 μF,
C_NR/SS = C_FF(4) = 10 nF, f = 120 Hz
Shutdown, temperature increasing
Reset, temperature decreasing
72
dB
170
°C
150
°C
–40
125 °C
(1) V_REF is measured at the NR/SS pin.
(2) To ensure stability at no load conditions, a current from the feedback resistive network equal to or greater than 5 μA is required.
(3) I_FB > 0 flows out of the device.
(4) C_FF refers to a feed-forward capacitor connected to the FB and OUT pins.
6
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