MAX3353E Maxim Integrated Products, MAX3353E Datasheet - Page 7

• Manufacturer Part Number: MAX3353E
• Description: USB On-the-Go Charge Pump
• Manufacturer: Maxim Integrated Products

The MAX3353E integrates a regulated charge pump,
switchable pullup/pulldown resistors, and an I
compatible 2-wire serial interface. The internal level
shifter allows the device to operate with logic supply volt-
ages (V
OTG-compliant charge pump operates with input supply
voltages (V
OTG-compatible output on V
output current.
The MAX3353E level-detector comparators monitor impor-
tant V
provides an interrupt output signal for OTG events that
require action. The V
various switching functions required by an OTG dual-role
device and is programmable by system logic.
For OTG operation, D+ and D- are connected to switch-
able pulldown resistors (host) and switchable pullup
resistors (peripheral) controlled by internal registers.
TSSOP
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
USB On-the-Go Charge Pump with Switchable
BUS
L
PIN
) between +1.65V and V
voltages needed to support SRP and HNP and
UCSP
CC
C5
D5
D4
C3
D3
D2
D1
C1
B1
A1
A2
A3
A4
A5
B5
—
) from +2.6V to +5.5V and supplies an
_______________________________________________________________________________________
BUS
ID_OUT
NAME
ID_IN
V
V
GND
SDA
ADD
N.C.
V
SCL
Detailed Description
INT
D+
C+
V
TRM
D-
C-
BUS
CC
L
power-control block performs the
Power-Supply Input. V
Logic Supply. V
INT, and ID_OUT. V
Serial Data Input/Output. I
Address Select Input. Address selection for the I
110kΩ pulldown resistor (see the 2-Wire I
Serial Clock Input. I
Interrupt Output. INT is an active-low output and can be set either open-drain or push/pull output
through control register 1 (default = open drain).
Device ID Output. Output of ID_IN level translated to V
Termination Supply Input. Connect +3V to +3.6V supply voltage for internal USB pullup resistors.
Bypass V
USB D- (±15kV ESD Protected)
USB D+ (±15kV ESD Protected)
Device ID Input. Internally pulled up to V
can be read through the I
No Connection. Not internally connected.
Ground
Charge-Pump Capacitor Negative Connection
Charge-Pump Capacitor Positive Connection
OTG Bus Supply. Provides power to the bus. V
GND with a 1µF capacitor.
BUS
CC
while sourcing 8mA
. The MAX3353E’s
TRM
to GND with a 0.1µF capacitor.
L
sets the logic output high voltage and logic input high threshold for SDA, SCL,
2
L
C bus serial clock input. Can be driven above V
can range from +1.65V to V
CC
2
input range is +2.6V to +5.5V. Bypass V
2
2
C interface (±15kV ESD protected).
C bus serial data input/open-drain output can be driven above V
Pullup/Pulldown Resistors
C-
The MAX3353E’s OTG-compliant charge-pump operates
with input supply voltages (V
and supplies an OTG-compatible output on V
the capability of sourcing 8mA (min) output current.
When V
of no more than 100kΩ and no less than 40kΩ to GND is
present on V
time on V
when driving a constant current load of 8mA and an
external load capacitance of 13µF.
During a continuous short circuit on V
pump output is current limited to 140mA (typ). Thermal-
shutdown circuitry turns off the charge pump if the die
temperature exceeds +150°C and restarts when the die
cools to 140°C.
Internal level shifters allow the system-side interface to
run at logic supply voltages as low as 1.65V. Interface
logic signals are referenced to the voltage applied to V
CC
2
C Compatible Serial Interface section for details).
. ID_IN logic state is V
FUNCTION
BUS
BUS
BUS
2
CC
C-compatible interface. ADD has an internal
is not providing power, an input impedance
BUS
can be back-driven to +6V. Bypass V
. Bypass V
from 0 to 4.4V is no longer than 100ms
L
.
. When V
L
to GND with a 0.1µF capacitor.
L
CC
BUS
level translated to ID_OUT and
L
to GND with a 1µF capacitor.
.
CC
Pin Description
provides power, the rise
) from +2.6V to +5.5V
Level Shifters
Charge Pump
BUS
, the charge-
BUS
BUS
L
.
to
with
L
7
.