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LM3687 データシート(PDF) 4 Page - Texas Instruments

部品番号 LM3687
部品情報  Step-Down DC-DC Converter
Download  30 Pages
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ホームページ  http://www.ti.com
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LM3687 データシート(HTML) 4 Page - Texas Instruments

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LM3687
SNVS473B – DECEMBER 2007 – REVISED MAY 2013
www.ti.com
Voltage Options
DC-DC Converter Output:
Linear Regulator Output:
VOUT_DCDC
VOUT_LIN
1.80V
1.50V
1.80V
1.20V
1.80V (1)
1.30V (1)
(1)
For availability of these or other output voltage combinations please contact your local Texas Instruments sales office
Enable Combinations
EN_DCDC
EN_LIN
Comments
0
0
No Outputs
0
1
Linear Regulator enabled only (1)
1
0
DC-DC converter enabled only
1
1
DC-DC converter and linear regulator active (1)
(1)
Startup Mode
Startup Mode:
VIN_LIN must be higher than VOUT_LIN(NOM) + 200mV in order to enable the main regulator (IMAX = 350mA).
If VIN_LIN < VOUT_LIN(NOM) + 100mV (100mV hysteresis), the startup LDO (IMAX = 50mA) is active, supplied from
VBATT.
For example in the typical post regulation application the LDO will remain in startup mode until the DC-DC
converter has ramped up its output voltage.
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.
Absolute Maximum Ratings
(1) (2) (3)
VIN_LIN, VBATT pins: Voltage to GND,
VIN_LIN≤ VBATT
-0.2V to 6.0V
VIN_LIN pin to VBATT pin
0.2V
Enable pins,
(GND-0.2V) to
Feedback pin,
(VBATT+0.2V) with
SW pin
6.0V max
Continuous Power Dissipation(4)
Internally Limited
Junction Temperature (TJ-MAX )
150°C
Storage Temperature Range
-65°C to + 150°C
Package Peak Reflow Temperature (Pb-free, 10-20 sec.) (5)
260°C
ESD Rating (6)
Human Body Model:
2.0kV
Machine Model
200V
(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.
(2)
All voltages are with respect to the potential at the SGND pin.
(3)
If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and
specifications.
(4)
Internal thermal shutdown circuitry protects the device from permanent damage. Thermal shutdown engages at TJ = 160°C (typ.) and
disengages at TJ = 140°C (typ.).
(5)
For detailed soldering specifications and information, please refer to Application Note 1112: DSBGA Wafer Level Chip Scale Package
SNVA009.
(6)
The Human body model is a 100pF capacitor discharged through a 1.5k
Ω resistor into each pin. The machine model is a 200pF
capacitor discharged directly into each pin. (MIL-STD-883 3015.7)
4
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Copyright © 2007–2013, Texas Instruments Incorporated
Product Folder Links: LM3687


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