LM5085MY/NOPB National Semiconductor, LM5085MY/NOPB Datasheet - Page 5

• Manufacturer Part Number: LM5085MY/NOPB
• Description: IC BUCK ADJ 8MSOPEP
• Manufacturer: National Semiconductor
• Series: PowerWise®r
• Type: Step-Down (Buck)r

Specifications of LM5085MY/NOPB

• Design Resources: LM(2)5085 Quick Start Calculator
• Internal Switch(s): No
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.25 ~ 75 V
• Frequency - Switching: Up to 1MHz
• Voltage - Input: 4.5 ~ 75 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP Exposed Pad, 8-HMSOP, 8-eMSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Power - Output: -
• Other names: LM5085MY

Off-Time
Regulation and Over-Voltage Comparators (FB Pin)
Soft-Start Function
Thermal Shutdown
Thermal Resistance
Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the
device is intended to be functional. For guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 2: The human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin.
Note 3: V
Note 4: For detailed information on soldering plastic MSOP and LLP packages refer to the Packaging Data Book available from National Semiconductor
Corporation.
Note 5: Tested on a 4 layer JEDEC board. Four vias provided under the exposed pad. See JEDEC standards JESD51-5 and JESD51-7.
Note 6: Operating current and shutdown current do not include the current in the R
Note 7: The tolerance of the minimum on-time (t
variations. A device which has an on-time at the high end of the range will have an off-time that is at the high end of its range.
Symbol
t
t
t
t
OFF(CL1)
OFF(CL2)
OFF(CL3)
OFF(CL4)
V
T
V
T
θ
θ
I
t
HYS
REF
FB
SS
OV
SD
JA
JC
CC
provides self bias for the internal gate drive.
Parameter
Off-time (current limit)
FB regulation threshold
FB over-voltage threshold
FB bias current
Soft-start time
Junction shutdown temperature
Junction shutdown hysteresis
Junction to ambient, 0 LFPM air flow
5)
Junction to case, 0 LFPM air flow
(Note
ON
-4) and the current limit off-times (t
7)
(Note
(Note
5) MSOP-8 package
Conditions
VIN = 12V, V
VIN = 12V, V
VIN = 48V, V
VIN = 48V, V
Measured with respect to V
Junction temperature rising
MSOP-8 package
MSOP-8EP package
LLP-8 package
MSOP-8EP package
LLP-8 package
5
T
resistor.
OFF(CL1)
FB
FB
FB
FB
= 0V
= 1V
= 0V
= 1V
through (t
OFF(CL4)
REF
) track each other over process and temperature
1.225
5.35
1.42
3.89
Min
1.4
16
1.25
Typ
350
170
126
7.9
1.9
5.7
2.5
5.5
9.1
24
10
20
46
54
29
10.84
1.275
www.national.com
Max
3.03
32.4
8.67
4.3
Units
°C/W
°C/W
mV
ms
nA
µs
µs
µs
µs
°C
°C
V