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MAX20046
Automotive Hi-Speed USB 2.0 Protector
General Description
Benefits and Features
● Low 23mA/45mA (MAX20046GTCA/V+) or 60/120mA
(MAX20046GTC/V+) Current Threshold for
Module-to-Module and Peripheral USB Connections
● Targeted Features for Optimized USB Performance
• Two RON 3.3Ω (typ) USB 2.0 Data Switches
• 480Mbps, 12Mbps or 1.5Mbps USB 2.0 Operation
• 9ms Fault-Recovery Time
• 1ms Overcurrent Blanking Time
• 5.7V (typ) Fixed HVBUS Protection Trip Threshold
● Robust for the Automotive Environment
• Short-to-Battery and Short-to-GND Protection on
Protected HVBUS Output
• Short-to-Battery and Short-to-HVBUS Protection
on HVD+ and HVD- Outputs
• Tested to ISO 10605 and IEC 61000-4-2 ESD
Standards
• 12-Pin (3mm x 3mm) TQFN-EP Package
• -40°C to +105°C Operating Temperature Range
• AEC-Q100 Qualified
The MAX20046 device provides high-ESD and shortcircuit protection for the low-voltage internal USB data
and USB power line in automotive radio, navigation,
connectivity, and USB hub applications. The device
supports USB Hi-Speed (480Mbps), USB full-speed
(12Mbps), and USB low-speed (1.5Mbps) operation.
The short-circuit protection features include short-tobattery on the protected HVBUS, as well as short-toHVBUS and short-to-battery on the protected HVD+ and
HVD-. Short-to-GND and overcurrent protection are also
provided on the protected HVBUS output to protect the
internal BUS power rail from overcurrent faults.
The device features high-ESD protection to ±15kV Air Gap
and ±8kV Contact on the protected HVBUS, HVD+, and
HVD- outputs.
The device features a 500mΩ (max) USB power switch,
and two low on-resistance (RON), USB 2.0 data switches.
This device also features an enable input, fault output, 9ms
fault-recovery time, 1ms overcurrent-blanking time, and
integrated overcurrent autoretry.
Applications
● Automotive USB Protection
The MAX20046 is available in a 12-pin lead-free,
TQFN-EP package and operate over the -40°C to +105°C
temperature range.
Ordering Information appears at end of data sheet.
Functional Diagram appears at end of data sheet.
Typical Operating Circuit
+3.3V
10uF
HVBUS
0.1uF
IN
1Ω
10uF
+5V
10uF
MAX20046
HVD+
HVD-
100kΩ
FAULT
ISET
USB CONNECTOR
19-8729; Rev 1; 7/18
BUS
EN
D+
GND
D-
LOW-VOLTAGE
USB
TRANSCEIVER
MAX20046
Automotive Hi-Speed USB 2.0 Protector
Absolute Maximum Ratings
D+, D- to IN.........................................................................+0.3V
HVBUS, HVD+, HVD-............................................-0.3V to +18V
(All voltages referenced to GND.)
BUS, IN....................................................................-0.3V to +6V
FAULT, EN, D+, D-, ISET.........................................-0.3V to +6V
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Package Information
PACKAGE TYPE: 12 TQFN
Package Code
T1233+5C
Outline Number
21-0136
Land Pattern Number
90-0019
PACKAGE TYPE: 12 SW TQFN
Package Code
T1233Y+5C
Outline Number
21-100171
Land Pattern Number
90-100060
THERMAL RESISTANCE, FOUR-LAYER BOARD
Junction to Ambient (θJA)
68°C/W
Junction to Case (θJC)
11°C/W
For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”,
“#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board.
For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
Electrical Characteristics
(VBUS = 5.0V VIN = +3.3V, TJ = TA = -40°C to +105°C. RL = ∞, unless otherwise noted. Typical values are at VEN = 0V or VEN = 3.3V
and TA = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
4.75
5.5
V
3.0
3.6
V
POWER SUPPLY
Power-Supply Range (BUS)
Power-Supply Range (IN)
BUS Input Current
IN Input Current
BUS Undervoltage Lockout
www.maximintegrated.com
VBUS
VIN
IBUS
IIN
VUVLO
VEN = 0V, no load, no fault
(MAX20046GTCA/V+)
440
VEN = 0V, no load, no fault
(MAX20046GTC/V+)
500
VEN = 0V, no load, no fault
12
μA
4.55
V
VBUS falling (Figure 1)
μA
3.85
4.2
Maxim Integrated │ 2
MAX20046
Automotive Hi-Speed USB 2.0 Protector
Electrical Characteristics (continued)
(VBUS = 5.0V VIN = +3.3V, TJ = TA = -40°C to +105°C. RL = ∞, unless otherwise noted. Typical values are at VEN = 0V or VEN = 3.3V
and TA = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
5.5
5.7
5.9
V
0.4
1
μs
9
11
ms
BUS ANALOG SWITCH
HVBUS Protection Trip
Threshold
VOV_BUS
HVBUS rising (Figure 2)
Voltage-Protection-Response
Time
tFP_BUS
HVBUS rising (Figure 2)
Protection-Recovery Time
HVBUS Short-to-Ground
Threshold
tFPR_BUS
VSHRT
HVBUS falling below VOV_BUS
(Figure 2)
6
Low-to-high transition (Figure 3)
(MAX20046GTCA/V+)
0.75
Low-to-high transition (Figure 3)
(MAX20046GTC/V+)
1.0
Short-to-Ground Response Time
tFPS
HVBUS falling to GND (Figure 3)
On-Resistance
RON
VBUS = 5V
Connect ISET to GND (Figure 4)
(MAX20046GTCA/V+)
Forward-Current Threshold
(Note 2)
ITHR
1.35
V
1.75
0.3
1
μs
150
270
500
mΩ
18
23
27
Connect ISET to 3.3V (Figure 4)
(MAX20046GTCA/V+)
34
45
55
Connect ISET to GND (Figure 4)
(MAX20046GTC/V+)
50
60
70
Connect ISET to 3.3V (Figure 4)
(MAX20046GTC/V+)
105
120
135
0.6
0.8
1.0
mA
Overcurrent Blanking Time
tBLANK
Figure 4
Overcurrent-Retry Blanking
Time
tBLANK_RETRY
Figure 4
9
Overcurrent-Autoretry Time
tRETRY
Figure 4
132
HVBUS Off-Leakage Current
ILKGOFF
ms
ms
ms
VHVBUS = 18V, VBUS = 4.75V
600
VHVBUS = 18V, VBUS = 0V, VIN = 0V
800
μA
Thermal Shutdown
165
°C
Thermal-Shutdown Hysteresis
15
°C
USB DATA SWITCH
Analog Signal Range
0
Protection-Trip Threshold
VOV_D
HVD+, HVD- rises from VIN to > VIN
+1V (Figure 2)
Protection-Recovery Time
tFPR_D
HVD+, HVD- falling to below VOV_D
(Figure 2)
Protection-Response Time
tFP_D
HVD+, HVD- rises from VIN to > VIN
+1V (Figure 2)
www.maximintegrated.com
6
3.6
V
3.9
V
9
11
ms
0.5
1
μs
Maxim Integrated │ 3
MAX20046
Automotive Hi-Speed USB 2.0 Protector
Electrical Characteristics (continued)
(VBUS = 5.0V VIN = +3.3V, TJ = TA = -40°C to +105°C. RL = ∞, unless otherwise noted. Typical values are at VEN = 0V or VEN = 3.3V
and TA = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
On-Resistance
On-Resistance Match Between
Channels
On-Resistance Flatness
SYMBOL
CONDITIONS
RON
VBUS = 5V, IL = 40mA, 0 ≤ VD ≤ 3.6V
Δ RON
RFLAT(ON)
MIN
TYP
MAX
3.3
Ω
VBUS = 5V, IL = 40mA, VD = 1.5V,
3.0V
0.25
Ω
IL = 40mA, VD = 0V or 0.4V
0.25
Ω
VHVD+, VHVD- = 18V, VD+, VD- = 0V
20
HVD+, HVD- Off-Leakage
Current
IHVD_OFF
VHVD+, VHVD- = 18V, VD+,
VD = 0V, VIN = 0V, VBUS = 0V
20
HVD+, HVD- On-Leakage
Current
IHVD_ON
VHVD+, VHVD = VIN, VEN = 0V
5
On-Channel -3dB Bandwidth
BW
RL = 50Ω, source impedance 50Ω
(Figure 5)
VOL
ISINK = 500μA
FAULT OUTPUT
FAULT Output Low Voltage
864
FAULT Output High-Leakage
Current
FAULT Recovery Time
tFPR
Input Logic-High
VIH
Input Logic-Low
VIL
EN INPUT
Input Leakage Current
Enable Delay Time
IEN
tD_EN
UNITS
VFAULT = VIN (Figure 3)
6
9
µA
MHz
0.5
V
1
μA
11
ms
1.65
V
VEN = 0V or VIN
No load on HVBUS
µA
0.5
V
1
μA
10
μs
ISET INPUT
Input Logic-High
VIH
Input Logic-Low
VIL
1.65
V
Input-Leakage Current
IISET
VISET = 0V or VIN
ESD Protection Level
VESD
Human Body Model
±2
ISO 10605 Air Gap (330pF, 2kΩ)
±25
ESD PROTECTION (D+, D-, BUS, EN, FAULT, IN, ISET)
0.5
V
2
μA
kV
ESD PROTECTION (HVD+, HVD-, HVBUS)
ESD Protection Level (Note 4)
VESD
ISO 10605 Contact (330pF, 2kΩ)
±8
IEC 61000-4-2 Air Gap (150pF, 330Ω)
±25
IEC 61000-4-2 Contact (150pF, 330Ω)
±8
kV
Note 1: Specifications with minimum and maximum limits are 100% production tested at TA = +25°C and are guaranteed over the
operating temperature range by design and characterization. Actual typical values may vary and are not guaranteed.
Note 2: Forward current is defined as current into BUS and out of HVBUS. See the Functional Diagram.
Note 3: Guaranteed by design. Limits are not production tested.
Note 4: Tested in the Typical Application Circuit, as shown on the evaluation kit.
www.maximintegrated.com
Maxim Integrated │ 4
MAX20046
Automotive Hi-Speed USB 2.0 Protector
Timing Diagrams/Test Circuits
VUVLO
VBUS
GND
ON
OFF
ON
DEVICE
tFPR_BUS
FAULT
GND
Figure 1. Timing Diagram for Undervoltage Lockout on BUS
VOV_D OR
VOV_BUS
GND
ON
DEVICE
FAULT
OFF
tFP_D
tFP_BUS
ON
tFPR_D
tFPR_BUS
GND
Figure 2. Timing Diagram for Overvoltage Protection on HVBUS, HVD+, and HVD-
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Maxim Integrated │ 5
MAX20046
Automotive Hi-Speed USB 2.0 Protector
Timing Diagrams/Test Circuits (continued)
HARD SHORT
HARD SHORT REMOVED
VHVBUS
VSHRT
GND
DEVICE
ON
ON
OFF
tFPS
FAULT
tFPR
GND
Figure 3. Timing Diagram for Short-to-Ground Protection
ITHR
CURRENT
GND
tBLANK
tBLANK_RETRY
tBLANK
tRETRY
DEVICE
ON
OFF
ON
OFF
FAULT
GND
Figure 4. Timing Diagram for Overcurrent Protection
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Maxim Integrated │ 6
MAX20046
Automotive Hi-Speed USB 2.0 Protector
Timing Diagrams/Test Circuits (continued)
D+
(D-)
50
VIN
NETWORK
ANALYZER
V
ON-LOSS = 20log OUT
VIN
V
CROSSTALK = 20log OUT
VIN
50
MAX20046
HVD+
(HVD-)
EN
HVD+
D+
HVDON-LOSS2 = 20log
DHVD+
CROSSTALK1 = 20log
DHVDCROSSTALK2 = 20log
D+
ON-LOSS1 = 20log
MEAS
VOUT
50
REF
50
GND
ON-LOSS IS MEASURED BETWEEN D+ AND HVD+, OR D- AND HVD-.
CROSSTALK IS MEASURED FROM ONE CHANNEL TO THE OTHER CHANNEL.
SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED.
Figure 5. On-Channel -3dB Bandwidth and Crosstalk
MAX20046
D_ OR
HVD_
EN
CAPACITANCE
METER
GND
Figure 6. On-Capacitance
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Maxim Integrated │ 7
MAX20046
Automotive Hi-Speed USB 2.0 Protector
Timing Diagrams/Test Circuits (continued)
MAX20046
INPUT+
RS
D+
HVD+
RL
INPUT-
RS
D-
HVD-
OUT+ RISE-TIME PROPAGATION DELAY = tPLHX OR tPLHY
FALL-TIME PROPAGATION DELAY = tPHLX OR tPHLY
tSKB = |tPLHX - tPLHY| OR |tPHLX - tPHLY|
tSKS = |tPLHX - tPHLX| OR |tPLHY - tPHLY|
OUT-
RL
EN
VIL TO VIH
tINFALL
tINRISE
V+
VINPUT+
50%
50%
50%
50%
0V
90%
10%
90%
10%
V+
VINPUT0V
tOUTRISE
V+
tPLHX
VOUT+
tOUTFALL
tPHLX
50%
50%
50%
50%
0V
90%
10%
90%
10%
V+
VOUT0V
tPHLY
tPLHY
Figure 7. Propagation Delay and Output Skew
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Maxim Integrated │ 8
MAX20046
Automotive Hi-Speed USB 2.0 Protector
Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
toc01
250
VBUS = 5V
260
VBUS = 4.75V
240
220
200
HVD+/HVD- LEAKAGE CURRENT
vs. TEMPERATURE
toc02
220
210
VBUS = 5V
200
190
VBUS = 4.75V
180
170
150
-15
10
35
60
TEMPERATURE (°C)
85
105
-40
-15
10
35
60
toc04
10
HVD+/HVD- SHORTED TO +5V
6
4
VEN = 0V
VBUS = 5V
VIN = 3.3V
2
3.345
-40
-15
10
35
60
-40
-15
10
35
60
85
105
TEMPERATURE (°C)
HVD+/HVD- LEAKAGE CURRENT
vs. TEMPERATURE(UNPOWERED)
toc05
HVD+/HVD- SHORTED TO +18V
12
10
8
HVD+/HVD- SHORTED TO +5V
6
4
VEN = 0V
VBUS = 5V
VIN = 3.3V
-40
-15
10
35
60
TEMPERATURE (°C)
DATA SWITCHRON
vs. APPLIED DATA VOLTAGE
DATA SWITCHRON
vs. APPLIED DATA VOLTAGE
toc06
5
VIN = 3.3V
4
VIN = 3.0V
TA = +25°C
TA = +105°C
2
TA = -40°C
VEN = 0V
VBUS = 5V
IL = 40mA
VIN = 3.3V
1
VIN = 3.6V
0
0.0
0.6
1.2
1.8
2.4
APPLIED DATA VOLTAGE (V)
www.maximintegrated.com
3.0
3.6
toc07
3
3.330
3.325
105
85
TEMPERATURE (°C)
VEN = 0V
VBUS = 5V
IL = 40mA
TA = +25°C
3.335
14
0
105
85
3.340
3.320
2.4
105
2
RON (Ω)
3.350
RON (Ω)
HVD+/HVD- CURRENT (µA)
HVD+/HVD- CURRENT (µA)
HVD+/HVD- SHORTED TO +18V
12
3.355
2.6
16
14
0
85
18
16
8
2.7
TEMPERATURE (°C)
HVD+/HVD- LEAKAGE CURRENT
vs. TEMPERATURE
18
2.8
2.5
160
-40
VEN = 0V
VBUS = 5V
VIN = 3.3V
VHVD = 3.3V
2.9
VBUS = 5.25V
230
toc03
3.0
VEN = VIN
240
VBUS = 5.25V
300
280
BUS SUPPLY CURRENT
vs. TEMPERATURE(EN = VIN)
HVD+/HVD- CURRENT (µA)
BUS SUPPLY CURRENT (µA)
320
VEN = 0V
BUS SUPPLY CURRENT (µA)
340
BUS SUPPLY CURRENT
vs. TEMPERATURE(EN = 0)
0.0
0.6
1.2
1.8
2.4
3.0
3.6
APPLIED DATA VOLTAGE (V)
Maxim Integrated │ 9
MAX20046
Automotive Hi-Speed USB 2.0 Protector
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
VD_
5V/div
5V/div
VHVD_
VFAULT
VIN
5V/div
2V/div
VFAULT
5V/div
VIN
toc11
VEN = 0V
VBUS = 5V
VIN = 3.3V
75
70
65
400
60
HVBUS SHORTED TO +18V
55
HVBUS SHORTED TO +6V
350
50
45
300
40
35
250
-40
-15
10
35
60
85
2V/div
-50
5V/div
-60
105
30
100
toc12
1000
200
190
180
HVBUS SHORTED TO +18V
550
170
160
HVBUS SHORTED TO +5V
500
150
140
450
130
400
-40
-15
10
35
60
120
105
85
BUS ON-RESISTANCE
HISTOGRAM
toc13
toc14
0.6
VBUS = 4.75V
VEN = 0V
VIN = 3.3V
IL = 40mA
10
VEN = 0V
VBUS = 0V
VIN = 0V
600
VEN = 0V
VBUS = 5V
VIN = 3.3V
IL = 50mA
0.5
NORMALIZED FREQUENCY
RON (mΩ)
-40
TEMPERATURE (°C)
BUS ON-RESISTANCE
vs. TEMPERATURE
400
-30
HVBUS LEAKAGE CURRENT
vs. TEMPERATURE
650
TEMPERATURE (°C)
450
-20
FREQUENCY (MHz)
80
HVBUS CURRENT (µA) - SHORT TO +6V
HVBUS CURRENT (µA) - SHORT TO +18V
450
HVBUS LEAKAGE CURRENT
vs. TEMPERATURE
toc10
-10
40µs/div
40µs/div
500
5V/div
VHVD_
CROSSTALK
0
HVBUS CURRENT (µA) - SHORT TO +5V
POWERED
TURBO/SKIP
toc09
UNPOWERED
TURBO/SKIP
HVBUS CURRENT (µA) - SHORT TO +18V
VD_
HVD+/HVD- SHORT-TO-BATTERY
TURN-OFF RESPONSE
toc08
CROSSTALK (dB)
HVD+/HVD- SHORT-TO-BATTERY
TURN-OFF RESPONSE
350
VBUS = 5V
300
0.4
+105°C
+25°C
0.3
-40°C
0.2
0.1
250
-40
-15
10
35
60
TEMPERATURE (°C)
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85
105
0
200
215
230
245
260
275
290
305
320
335
350
365
380
395
VBUS = 5.25V
RON (mΩ)
Maxim Integrated │ 10
MAX20046
Automotive Hi-Speed USB 2.0 Protector
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
HVBUS SHORT-TO-BATTERY
TURN-OFF RESPONSE
HVBUS SHORT-TO-BATTERY
TURN-OFF RESPONSE
toc15
VBUS
POWERED
5V/div
VHVBUS
5V/div
VFAULT
2V/div
VBUS
5V/div
VHVBUS
5V/div
VFAULT
2V/div
40µs/div
40µs/div
INRUSH CURRENT
ENABLE WITH RC LOAD
TURN-OFF RESPONSE
WITHRC LOAD
toc17
VFAULT
5V/div
VFAULT
VBUS
1V/div
VBUS
VHVBUS
5V/div
VHVBUS
5V/div
200mV/div
2V/div
500mA/div
12uF
12µF|| ||250Ω
250Ω
12µF || 250Ω
4ms/div
1ms/div
SHORT-CIRCUIT CURRENT
ENABLED INTO SHORT-TO-GROUND
HVBUS OVERCURRENT
AUTORETRYRESPONSE
toc19
HVBUS OVERCURRENT
AUTORETRYRESPONSE
toc20
toc21
VHVBUS > VSHRT
TURBO/SKIP
VHVBUS < VSHRT
TURBO/SKIP
2V/div
toc18
IHVBUS
500mA/div
IHVBUS
VEN
toc16
UNPOWERED
TURBO/SKIP
200mA/div
200mA/div IHVBUS
IHVBUS
VHVBUS
5V/div
VHVBUS
5V/div
VBUS
5V/div
VBUS
5V/div
VFAULT
5V/div
VFAULT
5V/div
100mA/div
IHVBUS
12µF || 250Ω
40µs/div
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20ms/div
20ms/div
Maxim Integrated │ 11
MAX20046
Automotive Hi-Speed USB 2.0 Protector
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
MAX20046 CURRENTTHRESHOLD HISTOGRAM
0.35
toc22
0.35
ITHR = 23mA
0.50
ITHR
45mA
THR == 40mA
0.45
NORMALIZED FREQUENCY
0.40
0.35
0.30
+105°C
0.25
+25°C
0.15
51.6
50.3
49.0
47.7
46.4
45.1
43.8
42.5
0.00
48
52
56
60
64
68
CURRENT-LIMIT THRESHOLD (mA)
HVBUS INRUSH CURRENT FOR
SHORT-TO-GROUNDRESPONSE
toc25
ITHR
120mA
THR == 100mA
0.40
0.35
0.30
+105°C
0.25
+25°C
72
toc26
VBUS
5V/div
VHVBUS
5V/div
VFAULT
5V/div
IHVBUS
2A/div
-40C
0.20
0.15
0.10
0.05
0.00
108
112
116
120
124
128
CURRENT-LIMIT THRESHOLD (mA)
132
10µs/div
USB 2.0 HIGH-SPEED EYE DIAGRAM
(NO TUNING COMPONENTS)
REFERENCE HIGH-SPEED EYE DIAGRAM
(NO MAX20046)
toc27
SINGLE-ENDED BANDWIDTH
toc28
toc29
0
--0.4
0
864 MHz
-3
|S21| (dB)
DIFFERENTIAL SIGNAL (V)
--0.4
0
-6
-9
--0.4
--0.4
-12
0
-40°C
0.20
CURRENT-LIMIT THRESHOLD (mA)
MAX20046 CURRENT
THRESHOLD HISTOGRAM
0.45
toc24
ITHR = 60mA
0.05
CURRENT-LIMIT THRESHOLD (mA)
0.50
MAX20046 CURRENTTHRESHOLD HISTOGRAM
0.10
24.8
24.4
24.0
23.6
23.2
22.8
22.4
22.0
21.6
21.2
0.00
20.8
0.00
20.4
0.05
NORMALIZED FREQUENCY
0.10
0.05
20.0
-40°C
0.15
41.2
0.10
+25°C
39.9
-40°C
0.15
0.20
38.6
+25°C
+105°C
37.3
0.20
0.25
36.0
+105°C
NORMALIZED FREQUENCY
0.25
DIFFERENTIAL SIGNAL (V)
toc23
0.30
0.30
NORMALIZED FREQUENCY
MAX20046 CURRENT
THRESHOLD HISTOGRAM
1
TIME (ns)
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2
0
1
TIME (ns)
2
10
100
1000
FREQUENCY (MHz)
Maxim Integrated │ 12
MAX20046
Automotive Hi-Speed USB 2.0 Protector
Pin Configuration
11
GND
12
D-
ISET
7
MAX20046
+
1
2
3
FAULT
EN
8
HVD-
10
9
HVD+
IN
D+
TOP VIEW
6
BUS
5
N.C.
4
HVBUS
TQFN / SW TQFN
3mm x 3mm
Pin Description
PIN
NAME
DESCRIPTION
1
HVD+
High-Voltage-Protected USB Differential Data D+ Output. Connect HVD+ directly to USB connector D+.
2
HVD-
High-Voltage-Protected USB Differential Data D- Output. Connect HVD- directly to USB connector D-.
3
FAULT
Open-Drain Fault-Indicator Output. Indicates if any of the following fault conditions exist: overvoltage on HVD-,
HVD+, or HVBUS; overcurrent on HVBUS; short-to-GND on HVBUS; UVLO on VBUS; or overtemperature.
4
HVBUS
Protected BUS Output. Connect HVBUS directly to the USB connector. Connect 0.1μF capacitor and a 1Ω
resistor in series with a 10μF capacitor from HVBUS to GND.
5
N.C.
No Connection. Internally connected to IC ground.
6
BUS
USB Power Supply. Connect BUS to USB +5V supply. Connect a 0.1μF and a 10μF, low-ESR ceramic
capacitor from BUS to GND.
7
ISET
HVBUS Current-Limit-Setting Pin. Connect ISET to GND or 3.3V based on the desired current limit, as outlined
in the Electrical Characteristics table.
8
D-
USB Differential Data D- Input. Connect D- to low-voltage USB transceiver D-.
9
D+
USB Differential Data D+ Input. Connect D+ to low-voltage USB transceiver D+.
10
IN
Logic Power-Supply Input. The supply voltage range is from +3.0V to +3.6V. Bypass IN to GND with a 10μF
ceramic capacitor.
11
EN
Active-Low Enable Input. Drive EN low to enable the BUS power switch.
12
GND
Ground
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Maxim Integrated │ 13
MAX20046
Detailed Description
The MAX20046 device provides high-ESD and shortcircuit protection for the USB data and USB power line
in automotive radio, navigation, connectivity, and USB
hub applications. The device supports USB Hi-Speed
(480Mbps), USB full-speed (12Mbps), and USB lowspeed (1.5Mbps) operation.
The short-circuit protection features include short-tobattery on the protected HVBUS, as well as short-toHVBUS and short-to-battery on the protected HVD+ and
HVD-. Short-to-GND and overcurrent protection are also
provided on the protected HVBUS output to protect the
internal BUS power rail from overcurrent faults.
The device features high-ESD protection to ±25kV Air
Gap Discharge and ±8kV Contact Discharge on all
protected HVBUS, HVD+, and HVD- outputs.
The device features a 500mΩ (max) USB power switch
and two low on-resistance (RON), USB 2.0 switches. This
device also features an enable input, fault output, 9ms
fault-recovery time, 1ms overcurrent blanking time, and
integrated overcurrent autoretry.
BUS Undervoltage Lockout ( Power-On Reset)
The device has a 4.2V (typ) undervoltage-lockout threshold (VUVLO). When VBUS is less than VUVLO, FAULT is
enabled and all the device switches are high impedance.
HVBUS Overvoltage Protection
The device has a fixed 5.7V (typ) HVBUS protection trip
threshold; when HVBUS rises from VBUS to > 5.7V, the
device is turned off. Connect a RC snubber network from
HVBUS to GND to limit positive inductive-voltage spikes
that are caused by inductance from long wires at turn-off.
HVBUS Short-to-Ground
The device has a short-to-ground threshold (VSHRT).
When HVBUS falls below the VSHRT threshold, the main
power switch is turned off. During continuous short-toground conditions, a small autoreset current remains active
to detect removal of the short circuit.
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Automotive Hi-Speed USB 2.0 Protector
HVBUS Overcurrent Protection
The device has GPIO selectable forward-current threshold (ITHR). When the HVBUS forward current exceeds
ITHR, the device is turned off. Connect the ISET pin to
GND or 3.3V to set the desired current limit, as shown
in the Electrical Characteristics table. Forward current is
defined as current into BUS and out of HVBUS. See the
Functional Diagram.
HVD+ and HVD- Overvoltage Protection
The device has a 3.9V (max) overvoltage threshold
(VOV_D). When HVD+ or HVD- is greater than VOV_D,
FAULT asserts low and all the device switches are high
impedance. Note that HVD+ and HVD- do not have shortto-ground protection. Forward current is limited by the
upstream transceiver.
FAULT Output
FAULT goes low when a fault is detected on HVD+,
HVD-, or HVBUS. FAULT indicates if any of the following
conditions exist: overvoltage on HVD-, HVD+, or HVBUS;
overcurrent on HVBUS; short-to-GND on HVBUS; UVLO
on VBUS; or overtemperature. All USB switches are
turned off in the event of a fault, except for short-toground fault on HVBUS in which case the data switches
remain active for OTG compatibility. Connect a 100kΩ
pullup resistor from FAULT to IN.
EN Input
EN is an active-low enable input. Drive EN low to enable
the BUS protection switch and allow for normal operation.
The MAX20046 device supports USB OTG. Disabling the
device through the EN pin disables the +5V BUS power
switch, but leaves the D+ and D- data switches closed.
This allows for a downstream device to assume the role of
host when negotiated per the USB Host Negotiation
Protocol. In this mode, the HVBUS, HVD+, and HVDoutputs continue to be protected and FAULT continues to
assert normally in response to overvoltage conditions on
these pins.
Maxim Integrated │ 14
MAX20046
Automotive Hi-Speed USB 2.0 Protector
Applications Information
ways; this product is characterized for protection to the
following limits:
Power-Supply Bypass Capacitor
Connect a 1Ω resistor in series with a 10µF capacitor from
HVBUS to GND to avoid overshoots. Bypass HVBUS to
GND with a 0.1µF ceramic capacitor as close as possible
to the device to provide ±2kV (HBM) ESD protection on
the pin. If the power source has significant inductance due
to long lead length, take care to prevent overshoots due
to the LC tank circuit and provide protection if necessary
to prevent violation of the +6V absolute maximum rating
on BUS. Connect a 10µF low-ESR ceramic capacitor from
BUS to GND. Connect a 10µF ceramic capacitor from IN
to GND. Place these components on the same plane as
the IC, close to the IN and GND pins.
Layout of USB Data Line Traces
USB Hi-Speed requires careful PCB layout with 90Ω
controlled-impedance matched traces of equal lengths.
Use LC tuning components on the data lines, as shown
in the Typical Operating Circuit. The values of these components are layout and captive-cable dependent. Contact
Maxim technical support for more detailed information.
±25kV ESD Protection
As with all Maxim devices, ESD-protection structures
are incorporated on all pins to protect against electrostatic discharges encountered during handling and
assembly. The device has extra protection against static
electricity. Maxim’s engineers have developed state-ofthe-art structures to protect against ESD of ±25kV at the
HVD+, HVD-, and HVBUS ports without damage. The
ESD structures withstand high ESD in all states: normal
operation, shutdown, and powered down. After an ESD
event, the device keeps working without latchup, whereas
other solutions can latch and must be powered down to
remove latchup. ESD protection can be tested in various
RC
1MΩ
CHARGE-CURRENTLIMIT RESISTOR
HIGHVOLTAGE
DC
SOURCE
CS
100pF
RD
1500Ω
Figure 8. Human Body ESD Test Model
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±2kV using the Human Body Model
●
±25kV using IEC 61000-4-2’s Air-Gap Discharge
method, EN = GND
●
±8kV using the Contact Discharge method specified
in IEC 61000-4-2, EN = GND
ESD Test Conditions
ESD performance depends on a variety of conditions.
Contact Maxim for a reliability report that documents test
setup, test methodology, and test results.
Human Body Model
Figure 8 shows the Human Body Model, and Figure 9
shows the current waveform it generates when discharged
into a low impedance. This model consists of a 100pF
capacitor charged to the ESD voltage of interest, which is
then discharged into the device through a 1.5kΩ resistor.
IEC 61000-4-2
The IEC 61000-4-2 standard covers ESD testing and
performance of finished equipment. The MAX20046 helps
users design equipment that meets Level 4 of IEC 610004-2. The main difference between tests done using the
Human Body Model and IEC 61000-4-2 is higher peak
current in IEC 61000-4-2. Because series resistance is
lower in the IEC 61000-4-2 ESD test model (Figure 10),
the ESD withstand voltage measured to this standard
is generally lower than that measured using the Human
Body Model. Figure 11 shows the current waveform for
the ±8kV, IEC 61000-4-2 Level 4, ESD Contact Discharge
test. The Air-Gap Discharge test involves approaching
the device with a charged probe. The Contact Discharge
method connects the probe to the device before the probe
is energized.
IP 100%
90%
DISCHARGE
RESISTANCE
STORAGE
CAPACITOR
●
IR
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
AMPERES
DEVICE
UNDER
TEST
36.8%
10%
0
0
tRL
TIME
tDL
CURRENT WAVEFORM
Figure 9. Human Body Current Waveform
Maxim Integrated │ 15
MAX20046
Automotive Hi-Speed USB 2.0 Protector
RD
330Ω
RC
50MΩ TO 100MΩ
HIGHVOLTAGE
DC
SOURCE
CS
150pF
DISCHARGE
RESISTANCE
IPEAK
CHARGE-CURRENTLIMIT RESISTOR
I
100%
90%
DEVICE
UNDER
TEST
STORAGE
CAPACITOR
10%
tr = 0.7ns TO 1ns
Figure 10. IEC 61000-4-2 ESD Test Model
30ns
t
60ns
Figure 11. IEC 61000-4-2 ESD Generator Current Waveform
Functional Diagram
FORWARD DIRECTION
HVBUS
BUS
IEC
SCR
CLAMP
SHORT
TO
GROUND
LV ESD
CLAMP
FORWARDCURRENT
DETECTION
UNDERVOLTAGE
LOCKOUT
OVP (SHORT-TOBATTERY AND/OR
SHORT-TO-VHVBUS
FAULT
EN
ISET
CONTROL
IN
THERMAL
SHUTDOWN
LV ESD
CLAMP
D+
HVD+
IEC
SCR
CLAMP
D-
HVDIEC
SCR
CLAMP
MAX20046
GND
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Maxim Integrated │ 16
MAX20046
Automotive Hi-Speed USB 2.0 Protector
Ordering Information
PART
TEMP RANGE
DESCRIPTION
PIN-PACKAGE
MAX20046GTCA/V+
-40°C to +105°C
GPIO-selectable 23/45mA current limits
12 TQFN-EP*
MAX20046GTCA/V+T
-40°C to +105°C
GPIO-selectable 23/45mA current limits
12 TQFN-EP*
MAX20046GTC/V+
-40°C to +105°C
GPIO-selectable 60/120mA current limits
12 TQFN-EP*
MAX20046GTC/V+T
-40°C to +105°C
GPIO-selectable 60/120mA current limits
12 TQFN-EP*
MAX20046GTCA/VY+
-40°C to +105°C
GPIO-selectable 23/45mA current limits
12 SW TQFN-EP*
MAX20046GTCA/VY+T
-40°C to +105°C
GPIO-selectable 23/45mA current limits
12 SW TQFN-EP*
MAX20046GTC/VY+
-40°C to +105°C
GPIO-selectable 60/120mA current limits
12 SW TQFN-EP*
MAX20046GTC/VY+T
-40°C to +105°C
GPIO-selectable 60/120mA current limits
12 SW TQFN-EP*
/V denotes an automotive qualified part.
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
T = Tape and reel.
Y = Side-wettable package.
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Chip Information
PROCESS: BiCMOS
Maxim Integrated │ 17
MAX20046
Automotive Hi-Speed USB 2.0 Protector
Revision History
REVISION
NUMBER
REVISION
DATE
PAGES
CHANGED
0
1/17
Initial release
1
718
Updated Package Information table, Pin Configuration, and Ordering Information table.
DESCRIPTION
—
2, 13, 17
For pricing, delivery, and ordering information, please visit Maxim Integrated’s online storefront at https://www.maximintegrated.com/en/storefront/storefront.html.
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits)
shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
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