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LM3686 Datasheet(PDF) 3 Page - Texas Instruments

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Part No. LM3686
Description  Step-Down DC-DC Converter with Integrated Post Linear Regulators System and Low-Noise Linear Regulator
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

LM3686 Datasheet(HTML) 3 Page - Texas Instruments

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D3
D2
A3
A2
D1
C1
A1
B1
C2
B2
C3
B3
A3
A2
D3
D2
A1
B1
C1
D1
C2
B2
C3
B3
LM3686
www.ti.com
SNVS520E – AUGUST 2008 – REVISED MAY 2013
Connection Diagram
Figure 3. 12-pin DSBGA Package
See Package Number YZR0012
ORDERING INFORMATION
PART NUMBER
VOLTAGE OPTIONS
1.8V_Bk
LM3686TL/TLX-AADW
1.2V_LILO
2.8V_LDO
1.2V_Bk
LM3686TLE/TLX-AAED
1.8V_LILO
2.8V_LDO
1.8V_Bk
LM3686TLE/TLXX-AAEF
1.2V_LILO
3.0V_LDO
PIN DESCRIPTIONS
Pin Number
Symbol
Name and Function
A1
PGND
Power Ground pin
A2
SW
Switching node connection to the internal PFET switch and NFET synchronous rectifier.
A3
FB_DCDC
Feedback analog input for the DC-DC converter. Connect to the output filter capacitor.
B1
VBATT
Power supply input for switcher. Connect to the input filter capacitor.
B2
EN_LILO
Enable input for the linear regulator. The linear regulator is in shutdown mode if voltage at this pin is
< 0.4V and enabled if > 1.1V. Do not leave this pin floating.
B3
EN_DCDC
Enable input for the DC-DC converter. The DC-DC converter is in shutdown mode if voltage at this pin is <
0.4V and enabled if > 1.1V. Do not leave this pin floating.
C1
VIN_LDO
Input power to LDO. ( Must tie to VBATT at all times )
C2
EN_LDO
Enable input for the linear regulator. The linear regulator is in shutdown mode if voltage at this pin is
< 0.4V and enabled if > 1.1V. Do not leave this pin floating.
C3
QGND
Quiet GND pin for LDO and reference circuit.
D1
VOUT_LDO
Voltage output of the linear regulator.
D2
VOUT_LILO
Voltage output of the low input linear regulator
D3
VIN_LILO
Input power to LILO (VIN_LILO connects to output of DCDC or standalone).
Copyright © 2008–2013, Texas Instruments Incorporated
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