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參數(shù)資料
| 型號： | AAT3125ISN-T1 |
| 廠商： | Advanced Analogic Technologies, Inc. |
| 英文描述： | USB OTG 5V Charge Pump |
| 中文描述： | USB OTG的5V的電荷泵 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大?。?/td> | 188K |
| 代理商： | AAT3125ISN-T1 |
AAT3125
USB OTG 5V Charge Pump
3125.2005.12.1.4
1
General Description
The AAT3125 USB On-the-Go (OTG) charge pump
is a member of AnalogicTech's Total Power
Management IC (TPMIC) product family. The
device integrates a high efficiency 1.5X fractional
100mA regulated charge pump for supplying V
BUS
with the additional functions required for OTG
devices (formerly known as dual role devices).
Four voltage detectors monitor V
BUS
, and a current
source dedicated for V
BUS
pulsing is provided for
compliance with Session Request Protocol (SRP)
as defined by the USB OTG Supplement.
The charge pump section uses a high efficiency
fractional topology, with a high frequency 750kHz
switching speed which enables the use of small
capacitors (less than 3.3μF). The AAT3125 fea-
tures extremely low quiescent current to extend
battery run time. Additionally, the device integrates
protection features such as under-voltage lockout,
and output short circuit and thermal protection.
The AAT3125 is available in a Pb-free, surface
mount QFN44-16 package and is rated over the
-40°C to +85°C temperature range.
Features
V
IN
Range: 2.7V to 5.5V
Regulated Fractional Charge Pump
100mA Output Current
Reverse Load Protection
Power Good Flag
SRP Detection Flag
SRP Ready Flag
Output Short-Circuit and Thermal Protection
Under-Voltage Protection
Less than 1μA Consumed While Disabled
Designed to Allow Operation with Output
Capacitance as Low as 3.3μF
16-pin QFN44 Package
-40°C to +85°C Temperature Range
Applications
Cell Phones
Hand-Held Computers
PDAs
Typical Application
IN
POK1
GND
SR
OUT
C
OUT
3.3
μ
F to 6.5
μ
F
C
IN
1
μ
F
1
μ
F
1
μ
F
1
μ
F
SR
POK2
SESDET
SRRDY
EN
EN
R1
R2
R3
R4
POK1
VBUS
POK2
SESDET
SRRDY
AAT3125
C1+
C1-
1 Cell
Li-Ion
C1
C2
C2+
C2-
80k
C
CP
OUTCP
R
CS
0.2
ChargePump
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