MAX3353EEUE+ Maxim Integrated Products, MAX3353EEUE+ Datasheet - Page 8

• Manufacturer Part Number: MAX3353EEUE+
• Description: IC CHARGE PUMP USB OTG 16TSSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX3353EEUE+

• Applications: Charge Pump, USB
• Voltage - Input: 2.6 ~ 5.5 V
• Number Of Outputs: 2
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Lead Free Status / Rohs Status: Details

Comparators drive status register bits 0, 1, and 2 to
indicate these important USB OTG V
• V
• A USB session is valid (V
• A USB session is ended (V
The 4.6V comparator sets bit 0 in status register
V
V
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
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
< 0.5V, and generates an interrupt when V
0.5V. Figure 1 shows the level-detector comparators.
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.
In shutdown mode, the MAX3353E’s quiescent current
is reduced to less than 2µA. Bit 0 in control register 2
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
generator and V
off. During shutdown, the I
functional and registers can be read from or written to.
ID_IN and ID_OUT are both functional in shutdown.
V
compliant voltage to the USB. The V
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
• Charge V
• Connect the charge pump to V
USB On-the-Go Charge Pump with Switchable
Pullup/Pulldown Resistors
8
BUS_VALID
BUS
BUS
sion is not in progress.
to initiate SRP (session request protocol).
on V
_______________________________________________________________________________________
BUS
valid status bit (V
is a dual-function I/O that can supply USB OTG-
BUS
is valid (V
V
.
BUS
to 1 if V
BUS
BUS
BUS
Level-Detection Comparators
through an internal current generator
BUS
BUS
through a resistor to ensure a ses-
detection comparators are turned
> 4.6V)
BUS_VALID
> 4.6V. The A Device uses the
BUS
2
C serial interface is fully
BUS
V
BUS
> 1.4V)
) to determine if the B
BUS
< 0.5V)
BUS
Interrupt Logic
BUS
Power Control
BUS
to provide power
> 1.4V. This sta-
voltage levels:
BUS
power-control
Shutdown
falls below
BUS
Bit 0 (SDWN) in control register 2 is used to place the
MAX3353E in normal operation or shutdown mode.
Setting bit 1 (V
suitable for implementing the session request protocol
(see the SRP V
by turning a current source – supplied by V
nected to V
2 (V
source continuously. Setting V
nects the current source. Bit 3 (V
Figure 1. Comparator Network Diagram
Figure 2. Power-Control Block Diagram
NOTE: SWITCHES ARE SHOWN IN THEIR DEFAULT
(POWER-ON) POSITIONS. A "1" CLOSES A SWITCH.
(POWER-ON)
DEFAULT
VALUES
CHARGE
BUS_CHG2
PUMP
V
ON/OFF
CC
7
0
BUS
CURRENT SOURCE
6
0
) to 1 charges VBUS through the current
V
BUS
BUS_CHG1
BUS
– on and off. Setting control register bit
5
0
Pulsing section). The pulse is created
4
0
) issues a timed pulse on V
4.6V
1.4V
0.5V
3
0
2
0
BUS_CHG2
CURRENT
TIMER
GATE
0 = OPERATING MODE
1 = SHUTDOWN MODE
1
0
BUS_DRV
0
1
V
SESSION_VALID
SESSION_END
to zero discon-
BUS_VALID
CONTROL REGISTER 2
5kΩ
CC
) turns the
and con-
67kΩ
V
BUS
BUS