ltc2950-1 Linear Technology Corporation, ltc2950-1 Datasheet - Page 14

• Manufacturer Part Number: ltc2950-1
• Description: Push Button On/off Controller
• Manufacturer: Linear Technology Corporation

LTC2950-1/LTC2950-2
TYPICAL APPLICATIONS
the PB board trace, however, will affect the open circuit
voltage on the PB pin. If the leakage is too large (>2μA),
the PB voltage may fall close to the threshold window.
To mitigate the effect of the board leakage, a 10k resistor
to V
PACKAGE DESCRIPTION
14
2.55 ±0.05
IN
NOTE:
1. DRAWING CONFORMS TO VERSION (WECD-1) IN JEDEC PACKAGE OUTLINE M0-229
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
1.15 ±0.05
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
is recommended (see Figure 9).
0.25 ± 0.05
0.61 ±0.05
(2 SIDES)
2.20 ±0.05
(2 SIDES)
0.50 BSC
0.70 ±0.05
PACKAGE
OUTLINE
V
IN
Figure 9. External Pull-Up Resistor on PB Pin
LEAKAGE CURRENT
EXTERNAL BOARD
(Reference LTC DWG # 05-08-1702 Rev B)
IF EXTERNAL PARASITIC BOARD
LEAKAGE >2μA, USE EXTERNAL
(SEE NOTE 6)
8-Lead Plastic DFN (3mm × 2mm)
TOP MARK
PIN 1 BAR
R7
10k
PULL-UP RESISTOR
0.200 REF
DDB Package
>2μA
3.00 ±0.10
(2 SIDES)
V
PB
Reverse Battery Protection
To protect the LTC2950 from a reverse battery connec-
tion, place a 1k resistor in series with the V
Figure 10).
IN
LTC2950-1/
LTC2950-2
2.4V
GND
100k
0.75 ±0.05
2.00 ±0.10
PINS OMITTED
(2 SIDES)
FOR CLARITY
0 – 0.05
2950 F09
R = 0.05
0.56 ± 0.05
(2 SIDES)
TYP
BOTTOM VIEW—EXPOSED PAD
0.25 ± 0.05
R = 0.115
TYP
4
5
2.15 ±0.05
(2 SIDES)
8
1
0.50 BSC
0.40 ± 0.10
IN
pin (see
PIN 1
R = 0.20 OR
0.25 × 45°
CHAMFER
(DDB8) DFN 0905 REV B
295012fc