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DC1334A_15

Description
LTC3576EUFE: Switching Power Manager
File Size436KB,7 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
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DC1334A_15 Overview

LTC3576EUFE: Switching Power Manager

QUICK START GUIDE FOR
LTC3576EUFE
DC1334A
LTC3576EUFE
Switching Power Manager + USB On-the-Go
+ OVP + HV Buck VC Control + 3 Bucks
L
, LTC, LTM, LT, Burst Mode, OPTI-LOOP, Over-The-Top and PolyPhase are registered
trademarks of Linear Technology Corporation. Adaptive Power, C-Load, DirectSense, Easy
Drive, FilterCAD, Hot Swap, LinearView, μModule, Micropower SwitcherCAD, Multimode
Dimming, No Latency
ΔΣ,
No Latency Delta-Sigma, No R
SENSE
, Operational Filter, PanelProtect,
PowerPath, PowerSOT, SmartStart, SoftSpan, Stage Shedding, SwitcherCAD, ThinSOT,
UltraFast and VLDO are trademarks of Linear Technology Corporation. Other product names
may be trademarks of the companies that manufacture the products.
DESCRIPTION
Demonstration Circuit DC1334A is a Switching Power
Manager with USB On-the-Go + Triple Step Down
DC/DCs. The LTC3576EUFE is available in a 38-pin
(4mm × 6mm) QFN surface mount package.
PERFORMANCE SUMMARY
Specifications are at T
A
= 25°C
SYMBOL
VUSB
VOUT
V
BAT
I
BAT
PARAMETER
VUSB Input Voltage Range
VOUT Output Voltage Range
Output Float Voltage
Output Charge Current
CONDITIONS
Input disabled from 6V–30V
Range is mode and load dependant
Constant voltage mode
Constant current mode
MIN
4.35
3.5
TYP
MAX
30
5.5
1
UNITS
V
V
V
A
4.2
0.5
SOFTWARE GUI
The DC1334A Demo Circuit can be controlled from a
software GUI.
Most of the features of the
LTC3576EUFE are only accessible via the I2C channel.
When the QuikEval program is active and a DC590
with a DC1334A connected and attached to the USB
cable, the “LTC3576” form should automatically pop
up and be fully operational:
SOFTWARE OPERATION
The software GUI automatically opens the control
panel shown above. This control panel allows con-
trol of most major functions of the LTC3576. The
EN1, EN2, EN3, and ENOTG signals are wire OR’ed
with individual regulator enable regulator signals
from the I2C channel. Consequent to this, if the ENx
or ENOTG signals are high, the regulators will be
enabled regardless of the state of the I2C channel
regulator control bits.
Register A , B, C and D display
These are not writeable and are provided as a pro-
gramming aid. The current value of the I2C A ,B, C
and D registers are displayed.
Update button
Forces an immediate update of the I2C registers.
Autoupdate button
If enabled (default) will update the I2C channel
whenever something is changed.
Figure 1. GUI control panel
1

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