lm8850urx National Semiconductor Corporation, lm8850urx Datasheet - Page 4

• Manufacturer Part Number: lm8850urx
• Description: High-performance, Step-up Dc-dc Converter For High- Power Applications In Mobile Devices
• Manufacturer: National Semiconductor Corporation

www.national.com
T
I
F
V
V
V
V
EN
ON
OSC
IH
IL
OH
OL
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the component may occur. Operating Ratings are conditions under which operation
of the device is guaranteed. Operating Ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated test conditions,
see the Electrical Characteristics tables.
Note 2: All voltages are with respect to the potential at the GND pin.
Note 3: Internal thermal shutdown circuitry protects the device from permanent damage. Thermal shutdown engages at T
= 140°C (typ.).
Note 4: The Human Body Model is a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin. The machine model is a 200 pF capacitor discharged
directly into each pin. MIL-STD-883–3015.7.
Note 5: In applications where high power dissipation and/or poor package resistance is present, the maximum ambient temperature may have to be derated.
Maximum ambient temperature (T
the device in the application (P
T
Note 6: Junction-to-ambient thermal resistance is highly application and board-layout dependent. In applications where high power dissipation exists, special
care must be given to thermal dissipation issues in board design.
Note 7: Min and Max limits are guaranteed by design, test or statistical analysis. Typical numbers are not guaranteed, but do represent the most likely norm.
Note 8: The parameters in the electrical characteristic table are tested under open loop conditions at V
over the input voltage range and closed loop condition, refer to the datasheet curves.
Note 9: Open-loop Electrical Characteristics taken without supercapacitor.
Dissipation Rating Table
A-MAX
Symbol
= T
70°C/W
J-MAX
θ
JA
− (θ
JA
Turn on Time
Pin Input current
Internal Oscillator
Frequency
Logic High Input
Logic Low Input
Logic Output High
Logic Output Low
x P
D-MAX
).
D-MAX
Parameter
A-MAX
) and the junction-to-ambient thermal resistance of the part/package (θ
Power Rating
) is dependent on the maximum operating junction temperature (T
T
1500 mW
A
≤
25°C
T
T
T
T
EN
ON
ON
ON
ON
= 00
= 01
= 10
= 11
Condition
4
Power Rating
T
980 mW
A
≤
60°C
IN
JA
= 3.6V unless otherwise specified. For performance
J-MAX-OP
) in the application, as given by the following equation:
2.25
Min
1.2
1.2
= 125°C), the maximum power dissipation of
J
12.5
0.01
Typ
= 150°C (typ.) and disengages at T
7.5
2.5
10
5
Power Rating
T
600 mW
A
≤
85°C
Max
2.75
0.4
0.4
1
Units
secs.
MHz
µA
V
J