參數(shù)資料
型號: TPS54260DGQR
廠商: TEXAS INSTRUMENTS INC
元件分類: 穩(wěn)壓器
英文描述: SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10
封裝: GREEN, PLASTIC, MSOP-10
文件頁數(shù): 23/49頁
文件大?。?/td> 1808K
代理商: TPS54260DGQR
www.ti.com
SLVSA86A – MARCH 2010 – REVISED DECEMBER 2010
THERMAL INFORMATION
TPS54260
THERMAL METRIC(1)(2)
UNITS
DGQ (10 PINS)
DRC (10 PINS)
qJA
Junction-to-ambient thermal resistance (standard board)
62.5
40
qJA
Junction-to-ambient thermal resistance (custom board) (3)
57
56.5
yJT
Junction-to-top characterization parameter
1.7
0.6
yJB
Junction-to-board characterization parameter
20.1
7.5
°C/W
qJCtop
Junction-to-case(top) thermal resistance
83
65
qJCbot
Junction-to-case(bottom) thermal resistance
21
7.8
qJB
Junction-to-board thermal resistance
28
8
(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 TA 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
ELECTRICAL CHARACTERISTICS
TJ = –40°C to 150°C, VIN = 3.5 to 60V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
SUPPLY VOLTAGE (VIN PIN)
Operating input voltage
3.5
60
V
Internal undervoltage lockout threshold
No voltage hysteresis, rising and falling
2.5
V
Shutdown supply current
EN = 0 V, 25°C, 3.5 V
≤ VIN ≤ 60 V
1.3
4
mA
Operating: nonswitching supply current
VSENSE = 0.83 V, VIN = 12 V, 25°C
138
200
ENABLE AND UVLO (EN PIN)
Enable threshold voltage
No voltage hysteresis, rising and falling, 25°C
1.15
1.25
1.36
V
Enable threshold +50 mV
–3.8
Input current
mA
Enable threshold –50 mV
–0.9
Hysteresis current
–2.9
mA
VOLTAGE REFERENCE
TJ = 25°C
0.792
0.8
0.808
Voltage reference
V
0.784
0.8
0.816
HIGH-SIDE MOSFET
VIN = 3.5 V, BOOT-PH = 3 V
300
On-resistance
m
VIN = 12 V, BOOT-PH = 6 V
200
410
ERROR AMPLIFIER
Input current
50
nA
Error amplifier transconductance (gM)
–2 mA < ICOMP < 2 mA, VCOMP = 1 V
310
mMhos
–2 mA < ICOMP < 2 mA, VCOMP = 1 V,
Error amplifier transconductance (gM) during
70
mMhos
slow start
VVSENSE = 0.4 V
Error amplifier dc gain
VVSENSE = 0.8 V
10,000
V/V
Error amplifier bandwidth
2700
kHz
Error amplifier source/sink
V(COMP) = 1 V, 100 mV overdrive
±27
mA
COMP to switch current transconductance
10.5
A/V
CURRENT LIMIT
Current limit threshold
VIN = 12 V, TJ = 25°C
3.5
6.1
A
THERMAL SHUTDOWN
Thermal shutdown
182
°C
Copyright 2010, Texas Instruments Incorporated
3
Product Folder Link(s): TPS54260
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