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参数资料
| 型号： | MAX3353EEUE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/21页 |
| 文件大小： | 0K |
| 描述： | IC CHARGE PUMP USB OTG 16TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | 充电泵，USB |
| 输入电压： | 2.6 V ~ 5.5 V |
| 输出数： | 2 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 16-TSSOP |
| 包装： | 带卷 (TR) |
USB On-the-Go Charge Pump with Switchable
Pullup/Pulldown Resistors
V BUS Level-Detection Comparators
Comparators drive status register bits 0, 1, and 2 to
indicate these important USB OTG V BUS voltage levels:
? V BUS is valid (V BUS > 4.6V)
? A USB session is valid (V BUS > 1.4V)
? A USB session is ended (V BUS < 0.5V)
The 4.6V comparator sets bit 0 in status register
V BUS_VALID to 1 if V BUS > 4.6V. The A Device uses the
V BUS valid status bit (V BUS_VALID ) to determine if the B
Device is sinking too much current (i.e., is not supported).
The interrupt can be associated to either a positive or a
negative transition. The 1.4V comparator sets bit 1 of sta-
tus register SESSION_VALID to 1 if V BUS > 1.4V. This sta-
tus bit indicates that a data transfer session is valid and
the interrupt can be associated to either a positive or a
negative transition. The session-end comparator sets bit
2 in the status register SESSION_END to a 1 when V BUS
< 0.5V, and generates an interrupt when V BUS falls below
V BUS
4.6V
1.4V
0.5V
Figure 1. Comparator Network Diagram
V BUS_VALID
SESSION_VALID
SESSION_END
0.5V. Figure 1 shows the level-detector comparators.
Interrupt Logic
When OTG events require action, the MAX3353E pro-
vides an interrupt output signal on INT . An interrupt is
triggered ( INT goes low) when one of the conditions
specified by the interrupt-mask register and interrupt-
edge register is verified. INT stays active until the inter-
rupt is cleared by reading the interrupt latch register.
V CC
CHARGE
PUMP
ON/OFF
CURRENT SOURCE
V BUS
67k Ω
Shutdown
In shutdown mode, the MAX3353E’s quiescent current
is reduced to less than 2μA. Bit 0 in control register 2
CURRENT
GATE
TIMER
5k Ω
controls the shutdown feature. Setting bit 0 = 1 places
the device in shutdown mode (Figure 2, Table 5). When
in shutdown, the MAX3353E’s charge-pump current
7
0
6
0
5
0
4
0
3
0
2
0
1
0
0
1
CONTROL REGISTER 2
generator and V BUS detection comparators are turned
off. During shutdown, the I 2 C serial interface is fully
DEFAULT
(POWER-ON)
VALUES
0 = OPERATING MODE
1 = SHUTDOWN MODE
functional and registers can be read from or written to.
ID_IN and ID_OUT are both functional in shutdown.
V BUS Power Control
V BUS is a dual-function I/O that can supply USB OTG-
compliant voltage to the USB. The V BUS power-control
block performs the various switching functions required
by an OTG dual-role device. This action is programmed
by the system logic using internal register control bits in
control register 2.
? Discharge V BUS through a resistor to ensure a ses-
sion is not in progress.
? Charge V BUS through an internal current generator
to initiate SRP (session request protocol).
? Connect the charge pump to V BUS to provide power
on V BUS .
NOTE: SWITCHES ARE SHOWN IN THEIR DEFAULT
(POWER-ON) POSITIONS. A "1" CLOSES A SWITCH.
Figure 2. Power-Control Block Diagram
Bit 0 (SDWN) in control register 2 is used to place the
MAX3353E in normal operation or shutdown mode.
Setting bit 1 (V BUS_CHG1 ) issues a timed pulse on V BUS
suitable for implementing the session request protocol
(see the SRP V BUS Pulsing section). The pulse is created
by turning a current source – supplied by V CC and con-
nected to V BUS – on and off. Setting control register bit
2 (V BUS_CHG2 ) to 1 charges VBUS through the current
source continuously. Setting V BUS_CHG2 to zero discon-
nects the current source. Bit 3 (V BUS_DRV ) turns the
8
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相关代理商/技术参数 |
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|---|---|
| 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 |
| MAX3355EEBC | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX3355EEBC+ | 制造商:Maxim Integrated Products 功能描述:CHG PUMP AND COMPARATORS - Rail/Tube |
| MAX3355EEBC+T | 功能描述:电荷泵 USB On-the-Go Charge Pump RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
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