- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385526 > MAX3353EEUE (MAXIM INTEGRATED PRODUCTS INC) USB On-the-Go Charge Pump with Switchable Pullup/Pulldown Resistors PDF資料下載
參數(shù)資料
| 型號(hào)： | MAX3353EEUE |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | USB On-the-Go Charge Pump with Switchable Pullup/Pulldown Resistors |
| 中文描述： | 0.015 A SWITCHED CAPACITOR REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | 4.40 MM, MO-153AB, TSSOP-16 |
| 文件頁數(shù)： | 10/21頁 |
| 文件大?。?/td> | 386K |
| 代理商： | MAX3353EEUE |
M
The MAX3353E also has a special feature that allows it
to control the timing of the V
BUS
pulse.
Since an OTG device could be plugged into a PC, the
V
BUS
pulse must be particularly well controlled to prevent
damage to a PC host. For this reason, V
BUS
pulsing is
done by turning on and off a current source. The V
BUS
pulse must be timed so it drives a 13μF load (when it is
connected to the A Device) to a voltage greater than
2.1V, and it drives a >96μF load (when it is connected to
a standard PC) to a voltage less than 2.0V.
Firmware can control the current source and the timing
of the V
BUS
pulse through the V
BUS_CHG2
control bit.
The MAX3353E also has the capability to time the pulse
itself. Firmware initiates the self-timed V
BUS
pulse by
setting the V
BUS_CHG1
control bit to 1.
The internal timer and current generator guarantee that
the V
BUS
voltage goes above 2.1V if C
VBUS
< 13μF
within 90ms and stands below 2.0V if C
VBUS
> 96μF.
Once the time has elapsed, if another V
BUS
pulse is
required, it is necessary to clear the V
BUS_CHG1
bit and
then set it again.
Note:
SRP V
BUS
pulsing and its associated current gen-
erator work only if the MAX3353E is not in shutdown.
Data-Line Pullup and Pulldown Resistance
For OTG operation, D+ and D- are connected to switch-
able pulldown resistors (host) and switchable pullup
resistors (peripheral). Data-line pullup/pulldown resistors
are individually controlled through data bits 4 through 7 in
control register 1. Two 15k
pulldown resistors allow the
device to be set as a host and are asserted by bits 6 and
7. The 1.5k
pullup resistor is applied to the data lines
through SW1 and SW2, which are controlled by bits 4 and
5. D+ pullup has higher priority to avoid direct connection
of D+ and D-. Each of the control bits controls a designat-
ed switch; therefore, pullup and pulldown switches can
be asserted at the same time. A simplified schematic of
the switching network is shown in Figure 3.
The bidirectional D+ and D- lines are ESD protected to
±15kV, reducing external components in many applications.
Applications Information
2-Wire I
2
C-Compatible Serial Interface
A register file that interfaces to the control logic uses a
simple 2-wire interface operating up to 400kHz to con-
trol the various switches and modes.
Serial Addressing
The MAX3353E operates as a slave that sends and
receives control and status signals through an I
2
C-
compatible 2-wire interface. The interface uses a serial
data line (SDA) and a serial clock line (SCL) to achieve
USB On-the-Go Charge Pump with Switchable
Pullup/Pulldown Resistors
10
______________________________________________________________________________________
7
0
6
0
5
0
4
0
3
0
2
0
1
0
0
0
CONTROL REGISTER 1
15k
1.5k
V
TRM
SW4
15k
SW3
SW2
SW1
D+
D-
GND
NOTE:
SWITCHES ARE SHOWN IN THEIR DEFAULT
(POWER-ON) POSITIONS. A "1" CLOSES A SWITCH.
BIT 4
0
0
1
1
BIT 5
0
1
0
1
SW1
OPEN
OPEN
CLOSED
CLOSED
SW2
OPEN
CLOSED
OPEN
OPEN
DEFAULT
(POWER ON)
VALUES
Figure 3. Pullup and Pulldown Resistors Network
SCL
SDA
t
F
t
LOW
t
SU:DAT
t
HD:STA
t
HD:DAT
t
SU:STO
t
BUF
t
HIGH
t
R
Figure 4. 2-Wire Serial Interface Timing Details
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX3355EEUD | +/-15kV ESD-Protected USB On-the-Go Charge Pump and Comparators in UCSP |
| MAX3386EEUP | 3.0V, 【15kV ESD-Protected RS-232 Transceiver for PDAs and Cell Phones |
| MAX3386E | Dual LVDS Receiver 8-SOIC -40 to 85 |
| MAX3386ECUP | Dual LVDS Receiver 8-MSOP -40 to 85 |
| MAX3387E | +3.0V to +5.5V, 10nA, 250kbps RS-232 Transceivers with ±15kV ESD-Protected I/O and Logic Pins I1(+3.0V至+5.5V,10nA,帶 ±15kV ESD保護(hù)接口和邏輯引腳，250kbps RS-232 收發(fā)器（3收3發(fā)）) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX3353EEUE+ | 功能描述:電荷泵 USB On-the-Go Charge Pump RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
| MAX3353EEUE+T | 功能描述:電荷泵 USB On-the-Go Charge Pump RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
| MAX3353EEUE-T | 功能描述:低壓差穩(wěn)壓器 - LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| MAX3353EEWP+ | 制造商:Maxim Integrated Products 功能描述:USB ON-THE-GO CHARGE PUMP WITH SWITCHABLE PULLUP/PULLDOWN RE - Rail/Tube |
| MAX3353EEWP+T | 制造商:Maxim Integrated Products 功能描述:USB ON-THE-GO CHARGE PUMP WITH SWITCHABLE PULLUP/PULLDOWN RE - Tape and Reel |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。