USB375x
USB 2.0 Protection IC with
Battery Charger Detection
PRODUCT FEATURES
Datasheet
— Standard Downstream Port (SDP); i.e. USB host or
downstream hub port
— Dedicated SE1 type chargers
VBUS
Over-Voltage Protection
— Protects internal circuits from VBUS up to 9V
— Over-Voltage/Under-Voltage Lockout opens VBUS
switch
— Interrupt to indicate Over-Voltage/Under-Voltage
Lockout
— Integrated Low R
DSON
FET
Dead Battery Provision Support (USB375x-1 only)
— Allows 100mA trickle charging from VBUS when
attached to a Standard Downstream Port (SDP) while
not enumerated
— Built-in 100mA current limiting option
USB Port ESD Protection (DP/DM/VBUS)
— ±15kV (air discharge)
— ±15kV (contact discharge)
— IEC 61000-4-2 level 4 ESD protection without external
devices
SMSC RapidCharge Anywhere™ Provides:
— 3-times the charging current through a USB port over
traditional solutions
— USB-IF Battery Charging 1.2 compliance to any
portable device
— Charging current up to 1.5Amps via compatible USB
host or dedicated charger
— Dedicated Charging Port (DCP), Charging (CDP) &
Standard (SDP) Downstream Port support
— Extremely low current design ideal for battery powered
applications
— Maximizes power delivered to the system
High Speed USB Mux for multiplexing the USB lanes
between different functions (USB3750 only)
— Switch the USB connector between two different
functions
— High bandwidth USB switch passes HS USB signals
Provides USB Battery Charger Detection for:
— USB-IF Battery Charging compliant Dedicated Charging
Ports (DCP)
— USB-IF Battery Charging compliant Charging
Downstream Port (CDP)
flexPWR
®
Technology
Industrial Operating Temperature -40°C to +85°C
USB375x Block Diagram
HS Switch is USB3750 feature only
DP_2
USB Connector
DP
ESD Protection
VBUS
DP
DM
DM_2
HS USB
Switch
USB 2.0 PHY,
Processor, or
Accessory
DM
DP_1
DM_1
Over-Voltage/Under-Voltage
Protection and Current
Limiting
DP
DM
VBUS
VBUS
USB 2.0 PHY,
Processor, or
Accessory
VOUT
VBUS
Battery
Charger/
PMU
GND
Charger
Detection
I
2
C
Interface
SCL
SDA
INT_B
Processor
SMSC USB375x
Revision 1.1 (02-12-13)
DATASHEET
USB 2.0 Protection IC with Battery Charger Detection
Datasheet
Order Numbers:
ORDER NUMBER
USB3750A-1-A4-TR
(see
Note 1)
USB3751A-1-A4-TR
(see
Note 2)
USB3751A-2-A4-TR
(see
Note 3)
Note 1
Note 2
Note 3
PACKAGE TYPE
PACKAGE SIZE
16 pin, QFN lead-free RoHS compliant
package
3.0mm x 3.0mm
Provides HS mux and support for 100mA dead battery current limiting.
Provides support for 100mA dead battery current limiting.
Does not provide support for 100mA dead battery current limiting.
This product meets the halogen maximum concentration values per IEC61249-2-21
For RoHS compliance and environmental information, please visit
www.smsc.com/rohs
Please contact your SMSC sales representative for additional documentation related to this product
such as application notes, anomaly sheets, and design guidelines.
Copyright © 2013 SMSC or its subsidiaries. All rights reserved.
Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently, complete information sufficient for
construction purposes is not necessarily given. Although the information has been checked and is believed to be accurate, no responsibility is assumed for inaccuracies. SMSC
reserves the right to make changes to specifications and product descriptions at any time without notice. Contact your local SMSC sales office to obtain the latest specifications
before placing your product order. The provision of this information does not convey to the purchaser of the described semiconductor devices any licenses under any patent
rights or other intellectual property rights of SMSC or others. All sales are expressly conditional on your agreement to the terms and conditions of the most recently dated
version of SMSC's standard Terms of Sale Agreement dated before the date of your order (the "Terms of Sale Agreement"). The product may contain design defects or errors
known as anomalies which may cause the product's functions to deviate from published specifications. Anomaly sheets are available upon request. SMSC products are not
designed, intended, authorized or warranted for use in any life support or other application where product failure could cause or contribute to personal injury or severe property
damage. Any and all such uses without prior written approval of an Officer of SMSC and further testing and/or modification will be fully at the risk of the customer. Copies of
this document or other SMSC literature, as well as the Terms of Sale Agreement, may be obtained by visiting SMSC’s website at http://www.smsc.com. SMSC is a registered
trademark of Standard Microsystems Corporation (“SMSC”). Product names and company names are the trademarks of their respective holders.
The Microchip name and logo, and the Microchip logo are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries.
SMSC DISCLAIMS AND EXCLUDES ANY AND ALL WARRANTIES, INCLUDING WITHOUT LIMITATION ANY AND ALL IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND AGAINST INFRINGEMENT AND THE LIKE, AND ANY AND ALL WARRANTIES ARISING FROM ANY COURSE OF
DEALING OR USAGE OF TRADE. IN NO EVENT SHALL SMSC BE LIABLE FOR ANY DIRECT, INCIDENTAL, INDIRECT, SPECIAL, PUNITIVE, OR CONSEQUENTIAL DAM-
AGES; OR FOR LOST DATA, PROFITS, SAVINGS OR REVENUES OF ANY KIND; REGARDLESS OF THE FORM OF ACTION, WHETHER BASED ON CONTRACT; TORT;
NEGLIGENCE OF SMSC OR OTHERS; STRICT LIABILITY; BREACH OF WARRANTY; OR OTHERWISE; WHETHER OR NOT ANY REMEDY OF BUYER IS HELD TO HAVE
FAILED OF ITS ESSENTIAL PURPOSE, AND WHETHER OR NOT SMSC H
Revision 1.1 (02-12-13)
2
SMSC USB375x
DATASHEET
USB 2.0 Protection IC with Battery Charger Detection
Datasheet
0.1
Reference Documents
Universal Serial Bus Specification, Revision 2.0
USB Battery Charging Specification, Revision 1.1
SMSC USB375x
3
Revision 1.1 (02-12-13)
DATASHEET
USB 2.0 Protection IC with Battery Charger Detection
Datasheet
Table of Contents
0.1 Reference Documents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Chapter 1 General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Chapter 2 Pin Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1 Pin Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2 Ball/Pin Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Chapter 3 Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1 Absolute Maximum Ratings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 Electrical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 Timing Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.1 UVLO and OVLO Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.2 Automatic Charger Detection Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10
10
13
13
13
Chapter 4 General Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.1 VBUS Protection Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1.1 100mA Current Limit (USB375x-1 Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 Charger Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.1 Charger Detection Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.2 Automatic Charger Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3 USB Mux (USB3750 Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4 USB375x Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.1 I2C Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.2 I2C Register Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.2.1 I2C Read Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.2.2 I2C Write Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.3 I2C Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.4 Reg 0: Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.5 Reg 1: Configuration Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.6 Reg 2: Battery Charger Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.7 Reg 3: Battery Charger Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
18
18
19
20
21
24
24
24
24
24
26
26
27
28
28
29
Chapter 5 Application Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.1 Application Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2 ESD Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.1 Human Body Model (HBM) Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.2 EN/IEC 61000-4-2 Performance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.2.1 Air Discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.2.2 Contact Discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
30
31
31
31
32
32
Chapter 6 Package Outline, Tape & Reel Drawings, Package Marking. . . . . . . . . . . . . . . . 33
Revision 1.1 (02-12-13)
4
SMSC USB375x
DATASHEET
USB 2.0 Protection IC with Battery Charger Detection
Datasheet
List of Figures
Figure 2.1
Figure 2.2
Figure 3.1
Figure 3.2
Figure 3.3
Figure 3.4
Figure 3.5
Figure 3.6
Figure 4.1
Figure 4.2
Figure 4.3
Figure 4.4
Figure 4.5
Figure 4.6
Figure 4.7
Figure 4.8
Figure 4.9
Figure 4.10
Figure 5.1
Figure 5.2
Figure 6.1
Figure 6.2
Figure 6.3
Figure 6.4
Figure 6.5
QFN Package Diagram (USB3750) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
QFN Package Diagram (USB3751) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
UVLO and OVLO Timing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Charger Detection Timing SDP (USB3750-1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Charger Detection Timing SDP (USB3751-x) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Charger Detection Timing DCP or CDP (USB3751-x) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Charger Detection Timing SE1 Charger (USB3750-1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Charger Detection Timing SE1 Charger (USB3751-x). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
USB3750 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
USB3751 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
USB Charger Detection Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Charger Detection Flow Chart (USB3750-1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Charger Detection Flow Chart (USB3751-1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Charger Detection Flow Chart (USB3751-2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
I2C Single Read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
I2C Continuous Read. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
I2C Single Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
I2C Continuous Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
USB3750 Device Application Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
USB3751 Device Application Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
16-Pin Lead-free QFN Package Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Tape and Reel Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Reel Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Tape Sections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Package Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
SMSC USB375x
5
Revision 1.1 (02-12-13)
DATASHEET
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