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LM26480SQ-AA_NOPB Datasheet(PDF) 4 Page - Texas Instruments

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No. de pieza LM26480SQ-AA_NOPB
Descripción Electrónicos  LM26480 Externally Programmable Dual High-Current Step-Down DC/DC and Dual Linear Regulators
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI1 - Texas Instruments

LM26480SQ-AA_NOPB Datasheet(HTML) 4 Page - Texas Instruments

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LM26480
SNVS543I – JANUARY 2008 – REVISED MAY 2013
www.ti.com
Connection Diagram
Figure 2. 24-Lead WQFN Package (top view)
Table 1. Default Options
Oscillator
Order Suffix
Spec
Buck Modes
nPOR Delay
UVLO
Sync
AECQ
Frequency
SQ-AA
NOPB
2.0 MHz
Auto-Mode
60 mS
Enabled
Disabled
No
QSQ-AA
NOPB
2.0 MHz
Auto-Mode
60 mS
Enabled
Disabled
Grade 1
QSQ-CF
NOPB
2.1 MHz
Forced PWM
60 mS
Disabled
Disabled
Grade 1
SQ-BF
NOPB
2.0 MHz
Forced PWM
60 mS
Enabled
Enabled
No
QSQ-8D
NOPB
2.1 MHz
Forced PWM
130 µS
Enabled
Disabled
Grade 1
Table 2. PIN DESCRIPTIONS(1)
WQFN Pin
Name
I/O
Type
Description
No.
1
VINLDO12
I
PWR
Analog Power for Internal Functions (VREF, BIAS, I2C, Logic)
2
SYNC
I
G/(D)
Frequency Synchronization pin which allows the user to connect an external clock
signal to synchronize the PMIC internal oscillator. Default OFF and must be
grounded when not used. Part number LM26480SQ-BF has this feature enabled.
Please contact Texas Instruments Sales Office/Distributors for availability of
LM26480SQ-BF.
3
NPOR
O
D
nPOR Power on reset pin for both Buck1 and Buck 2. Open drain logic output 100K
pullup resistor. nPOR is pulled to ground when the voltages on these supplies are
not good. See Flexible Power-On Reset (i.e., Power Good with Delay) section for
more info.
4
GND_SW1
G
G
Buck1 NMOS Power Ground
5
SW1
O
PWR
Buck1 switcher output pin
6
VIN1
I
PWR
Power in from either DC source or Battery to Buck1
7
ENSW1
I
D
Enable Pin for Buck1 switcher, a logic HIGH enables Buck1. Pin cannot be left
floating.
8
FB1
I
A
Buck1 input feedback terminal
9
GND_C
G
G
Non-switching core ground pin
10
AVDD
I
PWR
Analog Power for Buck converters
11
FB2
I
A
Buck2 input feedback terminal
12
ENSW2
I
D
Enable Pin for Buck2 switcher, a logic HIGH enables Buck2. Pin cannot be left
floating.
13
VIN2
I
PWR
Power in from either DC source or Battery to Buck2
(1)
A: Analog Pin
D: Digital Pin
G: Ground Pin
PWR: Power Pin
I: Input Pin
I/O: Input/Output Pin
O: Output Pin
4
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Product Folder Links: LM26480


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