TPS57160-Q1_16 Datasheet, PDF (5/54 Pages) Texas Instruments – 1.5-A 60-V Step-Down DC-DC Converter With Eco-mode Control

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TPS57160-Q1
SLVSAP1E – DECEMBER 2010 – REVISED MARCH 2015
7.4 Thermal Information
THERMAL METRIC⁽¹⁾⁽²⁾
DGQ (MSOP-
PowerPAD)
10 PINS
DRC (VSON)
10 PINS
UNIT
R_θJA
R_θJA
R_θJC(top)
R_θJB
ψ_JT
ψ_JB
R_θJC(bot)
Junction-to-ambient thermal resistance (standard board)
Junction-to-ambient thermal resistance (custom board)⁽³⁾
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
67.4
45.2
—
61.5
46.7
52.1
38.4
20.6
°C/W
1.9
0.9
38.1
20.8
15.9
5.2
(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.
(2) Power rating at a specific ambient temperature T_A should be determined with a junction temperature of 150°C. This is the point where
distortion starts to substantially increase. See power dissipation estimate in application section of this data sheet for more information.
(3) Test boards conditions:
(a) 3 inches x 3 inches, 2 layers, thickness: 0.062 inch
(b) 2 oz. copper traces located on the top of the PCB
(c) 2 oz. copper ground plane, bottom layer
(d) 6 thermal vias (13mil) located under the device package
7.5 Electrical Characteristics
T_J = –40°C to 150°C, VIN = 3.5 V to 60 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
SUPPLY VOLTAGE (VIN PIN)
Operating input voltage
Internal undervoltage lockout
threshold
No voltage hysteresis, rising and falling
Shutdown supply current
Operating nonswitching supply
current
EN = 0 V, 25°C, 3.5 V ≤ V_IN ≤ 60 V
EN = 0 V, 125°C, 3.5 V ≤ V_IN ≤ 60 V
VSENSE = 0.83 V, VIN = 12 V, T_J = 25°C
ENABLE AND UVLO (EN PIN)
Enable threshold voltage
Input current
No voltage hysteresis, rising and falling,
T_J = 25°C
Enable threshold +50 mV
Enable threshold –50 mV
Hysteresis current
VOLTAGE REFERENCE
Voltage reference
HIGH-SIDE MOSFET
On-resistance
VIN = 3.5 V, BOOT-PH = 3 V
VIN = 12 V, BOOT-PH = 6 V
ERROR AMPLIFIER
Input current
Error amplifier transconductance (g_M) –2 μA < I_COMP < 2 μA, V_COMP = 1 V
Error amplifier transconductance (g_M) –2 μA < I_COMP < 2 μA, V_COMP = 1 V,
during slow start
V_VSENSE = 0.4 V
Error amplifier dc gain
V_VSENSE = 0.8 V
Error amplifier bandwidth
Error amplifier source/sink
COMP to switch current
transconductance
V_(COMP) = 1 V, 100-mV overdrive
MIN TYP MAX UNIT
3.5
60 V
2.5
V
1.5
4
1.9
6.5 _μA
116
136
1.15 1.25 1.36 V
–3.8
μA
–0.9
–2.9
μA
0.792
0.8 0.808 V
300
mΩ
200
410
50
97
26
10,000
2700
±7
6
nA
μMhos
μMhos
V/V
kHz
μA
A/V
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