TPS61045
SLVS440A – JANUARY 2003 – REVISED SEPTEMBER 2003
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These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
ORDERING INFORMATION
(1)
T
A
-40°C to 85°C
(1)
8 PIN QFN PACKAGE (DRB)
TPS61045DRB
PACKAGE MARKING
BHT
The DRB package is available taped and reeled. Add R suffix (TPS61045DRBR) to order quantities of 3000 units per reel. Add T suffix
(TPS61045DBRT) to order quaqntities of 250 units per reel.
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range (unless otherwise noted) (1)
TPS61045
Supply voltage, V
(VIN)
(2)
Voltages, V
(CTRL)
, V
(FB)
, V
(L)
, V
(DO)
(2)
Voltage, V
(SW)
(2)
Continuous power dissipation
Operating junction temperature range
Storage temperature range, T
STG
Lead temperature (soldering, 10 sec)
(1)
-0.3 V to 7 V
-0.3 V to V
I
+ 0.3 V
30 V
See Dissipation Rating Table
-40°C to 150°C
-65°C to 150°C
260°C
(2)
Stresses beyond those listed under
absolute maximum ratings
may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under
recommended operating
conditions
is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
All voltage values are with respect to network ground terminal.
DISSIPATION RATING
PACKAGE
8 pin QFN (DRB) (1)
(1)
T
A
≤25°C
POWER
RATING
370 mW
DERATING FACTOR
ABOVE T
A
= 25°C
3.7 mW/°C
T
A
= 70°C POWER
RATING
204 mW
T
A
= 85°C POWER
RATING
148 mW
The thermal resistance junction to ambient of the 8 pin QFN package is 270°C/W. Standard 2 layer PCB without vias for the thermal
pad. See the appliction section on how to improve the thermal resistance R
ΘJA
.
RECOMMENDED OPERATING CONDITIONS
MIN
V
(VIN)
V
(SW)
L
f
C
I(C2)
C
O(C3)
T
A
T
J
(1)
Input voltage range
Switch voltage
Inductor (1)
Switching frequency (1)
Input capacitor (C2) (1)
Output capacitor (C3) (1)
Operating ambient temperature
Operating junction temperature
See application section for further information.
-40
-40
4.7
1
85
125
4.7
1
1.8
TYP
MAX
6.0
30
UNIT
V
V
µH
MHz
µF
µF
°C
°C
2
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