ZSPM9060ZA1R [IDT]
Ultra-Compact, High-Performance High-Frequency DrMOS Device;型号: | ZSPM9060ZA1R |
厂家: | INTEGRATED DEVICE TECHNOLOGY |
描述: | Ultra-Compact, High-Performance High-Frequency DrMOS Device 服务器主板节能技术 |
文件: | 总30页 (文件大小:715K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
ZSPM9060
Ultra-Compact, High-Performance,
High-Frequency DrMOS Device
Datasheet
Brief Description
Benefits
•
•
•
Fully optimized system efficiency: >93% peak
The ZSPM9060 is IDT’s next-generation, fully
optimized, ultra-compact, integrated MOSFET plus
driver power stage solution for high-current, high-
frequency, synchronous buck DC-DC applications.
The ZSPM9060 integrates a driver IC, two power
MOSFETs, and a bootstrap Schottky diode into a
thermally enhanced, ultra-compact 6x6mm package.
Clean switching waveforms with minimal ringing
72% space-saving compared to conventional
discrete solutions
•
•
High current handling
Optimized for use with IDT’s ZSPM1000 true
digital PWM controller
With an integrated approach, the complete switching
power stage is optimized with regard to driver and
MOSFET dynamic performance, system inductance,
and power MOSFET RDS(ON). The ZSPM9060 uses
innovative high-performance MOSFET technology,
Available Support
•
ZSPM8060-KIT: Open-Loop Evaluation Board
for ZSPM9060
which dramatically reduces
switch ringing,
eliminating the need for a snubber circuit in most
buck converter applications.
Physical Characteristics
•
•
•
•
•
Operation temperature: -40°C to +125°C
VIN: 3V to 16V (typical 12V)
A driver IC with reduced dead times and propagation
delays further enhances the performance. A thermal
warning function warns of a potential over-tempera-
ture situation. The ZSPM9060 also provides a Skip
Mode (SMOD#) for improved light-load efficiency. It
also provides a tri-state 3.3V PWM input for
compatibility with a wide range of PWM controllers.
IOUT: up to 60A
Low-profile SMD package: 6mmx6mm PQFN40
IDT green packaging and RoHS compliant
The ZSPM9060 DrMOS is compatible with IDT’s
ZSPM1000, a leading-edge configurable digital
power-management system controller for non-iso-
lated point-of-load (POL) supplies.
Typical Application
Features
•
•
•
•
•
•
•
•
Based on the Intel® 4.0 DrMOS standard
High-current handling: up to 60A
High-performance PQFN copper-clip package
Tri-state 3.3V PWM input driver
Skip Mode (low-side gate turn-off) input (SMOD#)
Warning flag for over-temperature conditions
Driver output disable function (DISB# pin)
Internal pull-up and pull-down for SMOD# and
DISB# inputs, respectively
•
Integrated Schottky diode technology in the
low-side MOSFET
•
•
Integrated bootstrap Schottky diode
Adaptive gate drive timing for shoot-through
protection
•
•
Under-voltage lockout (UVLO)
Optimized for switching frequencies ≤ 1MHz
© 2016 Integrated Device Technology, Inc.
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ZSPM9060
Ultra-Compact, High-Performance,
High-Frequency DrMOS Device
Datasheet
ZSPM9060 Block Diagram
VDRV
BOOT
VIN
DBoot
Typical Applications
•
High-performance gaming
motherboards
UVLO
10µA
VCIN
(Q1)
HS Power
MOSFET
GH
GH
Logic
Level Shift
DISB#
•
Compact blade servers,
Vcore and non-Vcore
DC-DC converters
GH
30k
VCIN
•
Desktop computers,
Vcore and Non-Vcore
DC-DC converters
PHASE
RUP_PWM
Dead Time
Control
Input
Tri-State
Logic
PWM
VSWH
•
•
Workstations
RDN_PWM
VDRV
High-current DC-DC point-
of-load converters
(Q2)
LS Power
MOSFET
GL
30k
GL
Logic
•
•
Networking and telecom
microprocessor voltage
regulators
THWN#
VCIN
GL
Temp
Sense
Small form-factor voltage
regulator modules
10µA
CGND
SMOD#
PGND
Ordering Information
Sales Code
Description
Package
Reel
ZSPM9060ZA1R ZSPM9060 RoHS-Compliant Clip-Bond PQFN40 - Temperature range: -40 to +125 °C
ZSPM8060-KIT
Open-Loop Evaluation Board for ZSPM9060
Circuit Board
Corporate Headquarters
6024 Silver Creek Valley Road
San Jose, CA 95138
Sales
Tech Support
www.IDT.com/go/support
1-800-345-7015 or 408-284-8200
Fax: 408-284-2775
www.IDT.com/go/sales
www.IDT.com
DISCLAIMER Integrated Device Technology, Inc. (IDT) reserves the right to modify the products and/or specifications described herein at any time, without notice, at IDT's sole discretion. Performance
specifications and operating parameters of the described products are determined in an independent state and are not guaranteed to perform the same way when installed in customer products. The
information contained herein is provided without representation or warranty of any kind, whether express or implied, including, but not limited to, the suitability of IDT's products for any particular purpose, an
implied warranty of merchantability, or non-infringement of the intellectual property rights of others. This document is presented only as a guide and does not convey any license under intellectual property
rights of IDT or any third parties.
IDT's products are not intended for use in applications involving extreme environmental conditions or in life support systems or similar devices where the failure or malfunction of an IDT product can be
reasonably expected to significantly affect the health or safety of users. Anyone using an IDT product in such a manner does so at their own risk, absent an express, written agreement by IDT.
Integrated Device Technology, IDT and the IDT logo are trademarks or registered trademarks of IDT and its subsidiaries in the United States and other countries. Other trademarks used herein are the
property of IDT or their respective third party owners. For datasheet type definitions and a glossary of common terms, visit www.idt.com/go/glossary. All contents of this document are copyright of Integrated
Device Technology, Inc. All rights reserved.
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ZSPM9060 Datasheet
Contents
1
IC Characteristics ................................................................................................................................................5
1.1. Absolute Maximum Ratings..........................................................................................................................5
1.2. Recommended Operating Conditions ..........................................................................................................6
1.3. Electrical Parameters ...................................................................................................................................6
1.4. Typical Performance Characteristics............................................................................................................9
Functional Description.......................................................................................................................................14
2.1. VDRV and Disable (DISB#)........................................................................................................................15
2.2. Thermal Warning Flag (THWN#)................................................................................................................16
2.3. Tri-state PWM Input....................................................................................................................................16
2.4. Adaptive Gate Drive Circuit ........................................................................................................................18
2.5. Skip Mode (SMOD#) ..................................................................................................................................18
2.6. PWM...........................................................................................................................................................20
Application Design.............................................................................................................................................21
3.1. Supply Capacitor Selection ........................................................................................................................21
3.2. Bootstrap Circuit .........................................................................................................................................21
3.3. VCIN Filter ..................................................................................................................................................21
3.4. Power Loss and Efficiency Testing Procedures.........................................................................................22
Pin Configuration and Package.........................................................................................................................24
4.1. Available Packages ....................................................................................................................................24
4.2. Pin Description............................................................................................................................................25
4.3. Package Dimensions..................................................................................................................................26
Circuit Board Layout Considerations.................................................................................................................27
Glossary ............................................................................................................................................................29
Ordering Information .........................................................................................................................................29
Related Documents...........................................................................................................................................29
Document Revision History...............................................................................................................................30
2
3
4
5
6
7
8
9
List of Figures
Figure 1.1 Safe Operating Area..............................................................................................................................9
Figure 1.2 Module Power Loss vs. Output Current.................................................................................................9
Figure 1.3 Power Loss vs. Switching Frequency....................................................................................................9
Figure 1.4 Power Loss vs. Input Voltage ................................................................................................................9
Figure 1.5 Power Loss vs. Driver Supply Voltage ................................................................................................10
Figure 1.6 Power Loss vs. Output Voltage ...........................................................................................................10
Figure 1.7 Power Loss vs. Output Inductance......................................................................................................10
Figure 1.8 Driver Supply Current vs. Switch Frequency.......................................................................................10
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ZSPM9060 Datasheet
Figure 1.9 Driver Supply Current vs. Driver Supply Voltage................................................................................11
Figure 1.10 Driver Supply Current vs. Output Current............................................................................................11
Figure 1.11 UVLO Threshold vs. Temperature.......................................................................................................11
Figure 1.12 PWM Thresholds vs. Driver Supply Voltage........................................................................................11
Figure 1.13 PWM Threshold vs. Temperature........................................................................................................12
Figure 1.14 SMOD# Threshold vs. Driver Supply Voltage .....................................................................................12
Figure 1.15 SMOD# Thresholds vs. Temperature..................................................................................................12
Figure 1.16 SMOD# Pull-Up Current vs. Temperature...........................................................................................12
Figure 1.17 Disable (DISB#) Thresholds vs. Driver Supply Voltage.......................................................................13
Figure 1.18 Disable (DISB#) Thresholds vs. Temperature.....................................................................................13
Figure 1.19 Disable Pull-Down Current vs. Temperature.......................................................................................13
Figure 1.20 Boot Diode Forward Voltage vs. Temperature ....................................................................................13
Figure 2.1 Typical Application Circuit with PWM Control......................................................................................14
Figure 2.2 ZSPM9060 Block Diagram ..................................................................................................................15
Figure 2.3 Thermal Warning Flag (THWN) Operation..........................................................................................16
Figure 2.4 PWM and Tri-State Timing Diagram....................................................................................................17
Figure 2.5 SMOD# Timing Diagram......................................................................................................................19
Figure 2.6 PWM Timing ........................................................................................................................................20
Figure 3.1 VCIN Filter Block Diagram.....................................................................................................................21
Figure 3.2 Power Loss Measurement Block Diagram ..........................................................................................22
Figure 4.1 Pin-out PQFN40 Package ...................................................................................................................24
Figure 4.2 Clip-Bond PQFN40 Physical Dimensions and Recommended Footprint............................................26
Figure 5.1 PCB Layout Example...........................................................................................................................28
List of Tables
Table 2.1
Table 2.2
UVLO and Disable Logic .....................................................................................................................15
SMOD# Logic.......................................................................................................................................18
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ZSPM9060 Datasheet
1
IC Characteristics
1.1. Absolute Maximum Ratings
The absolute maximum ratings are stress ratings only. The device might not function or be operable above the
recommended operating conditions. Stresses exceeding the absolute maximum ratings might also damage the
device. In addition, extended exposure to stresses above the recommended operating conditions might affect
device reliability. IDT does not recommend designing to the “Absolute Maximum Ratings.”
PARAMETER
SYMBOL
CONDITIONS
MIN
MAX
UNITS
Maximum Voltage to CGND –
VCIN, VDRV, DISB#, PWM, SMOD#,
GL, THWN# pins
-0.3
6.0
V
Maximum Voltage to PGND or CGND –
VIN pin
-0.3
-0.3
-0.3
-0.3
-8.0
25.0
6.0
V
V
V
V
Maximum Voltage to VSWH or PHASE –
BOOT, GH pins
Maximum Voltage to CGND –
BOOT, PHASE, GH pins
25.0
25.0
Maximum Voltage to CGND or PGND –
VSWH pin
DC only
< 20ns
Maximum Voltage to PGND – VSWH pin
Maximum Voltage to VDRV – BOOT pin
Maximum Voltage to VDRV – BOOT pin
Maximum Sink Current – THWN# pin
28.0
22.0
25.0
7.0
V
V
< 20ns
V
-0.1
mA
ITHWN#
f
SW=300kHz, VIN=12V,
60
A
VOUT=1.0V
Maximum Average Output Current 1)
IOUT(AV)
fSW=1MHz, VIN=12V,
VOUT=1.0V
55
A
2.7
°C/W
°C
Junction-to-PCB Thermal Resistance
Ambient Temperature Range
Maximum Junction Temperature
Storage Temperature Range
θJPCB
TAMB
TjMAX
TSTOR
-40
+125
+150
+150
°C
-55
°C
Human Body Model, JESD22-
A114
2000
V
Electrostatic Discharge Protection
ESD
Charged Device Model,
JESD22-C101
2500
V
1)
IOUT(AV) is rated using a DrMOS Evaluation Board, TA = 25°C, natural convection cooling. This rating is limited by the peak
DrMOS temperature, TjMAX = 150°C, and varies depending on operating conditions, PCB layout, and PCB board to ambient
thermal resistance. This rating can be changed with different application settings.
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ZSPM9060 Datasheet
1.2. Recommended Operating Conditions
The “Recommended Operating Conditions” table defines the conditions for actual device operation. Recom-
mended operating conditions are specified to ensure optimal performance to the datasheet specifications. IDT
does not recommend exceeding them or designing to the “Absolute Maximum Ratings.”
PARAMETER
SYMBOL
VCIN
CONDITIONS
MIN
4.5
4.5
3.0
TYP
5.0
MAX
5.5
UNITS
Control Circuit Supply Voltage
Gate Drive Circuit Supply Voltage
Output Stage Supply Voltage
V
V
V
VDRV
5.0
5.5
16.0 1)
VIN
12.0
1) Operating at high VIN can create excessive AC overshoots on the VSWH-to-GND and BOOT-to-GND nodes during MOSFET
switching transients. For reliable DrMOS operation, VSWH-to-GND and BOOT-to-GND must remain at or below the "Absolute
Maximum Ratings" shown in the table above. Refer to sections 3 and 5 of this datasheet for additional information.
1.3. Electrical Parameters
Typical values are VIN = 12V, VCIN = 5V, VDRV = 5V, and TAMB = +25°C unless otherwise noted.
PARAMETER
Basic Operation
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Quiescent Current
IQ
IQ=IVCIN+IVDRV, PWM=LOW or
HIGH or float
2
mA
Under-Voltage Lock-Out
UVLO Threshold
UVLO Hysteresis
PWM Input
UVLO
VCIN rising
2.9
3.1
0.4
3.3
V
V
UVLO_Hyst
Pull-Up Impedance
RUP_PWM
VPWM=5V
VCIN = VDRV = 5V ±10%
26
12
kΩ
kΩ
Pull-Down Impedance
RDN_PWM VPWM=0V
VCIN = VDRV = 5V ±10%
VCIN = VDRV = 5V ±10%
VCIN = VDRV = 5V ±5%
VCIN = VDRV = 5V ±10%
VCIN = VDRV = 5V ±5%
1.88
2.00
1.84
1.94
2.25
2.25
2.20
2.20
2.61
2.50
2.56
2.46
V
V
V
V
PWM High-Level Voltage
Tri-state Upper Threshold
VIH_PWM
VTRI_HI
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ZSPM9060 Datasheet
PARAMETER
SYMBOL
CONDITIONS
VCIN = VDRV = 5V ±10%
VCIN = VDRV = 5V ±5%
VCIN = VDRV = 5V ±10%
VCIN = VDRV = 5V ±5%
MIN
0.70
0.75
0.62
0.66
TYP
0.95
0.95
0.85
0.85
160
MAX
1.19
1.15
1.13
1.09
200
UNITS
Tri-state Lower Threshold
VTRI_LO
V
V
V
PWM Low-Level Voltage
VIL_PWM
V
Tri-state Shutoff Time
Tri-state Open Voltage
tD_HOLD-OFF
ns
V
VHiZ_PWM VCIN = VDRV = 5V ±10%
VCIN = VDRV = 5V ±5%
tPWM-OFF_MIN
1.40
1.45
120
1.60
1.60
1.90
1.80
V
PWM Minimum Off Time
DISB# Input
ns
High-Level Input Voltage
Low-Level Input Voltage
Pull-Down Current
VIH_DISB#
VIL_DISB#
IPLD
2
V
V
0.8
10
25
µA
ns
Propagation Delay DISB#, GL
Transition from HIGH to LOW
tPD_DISBL
PWM=GND
PWM=GND
Propagation Delay DISB#, GL
Transition from LOW to HIGH
tPD_DISBH
25
ns
SMOD# Input
High-Level Input Voltage
Low-Level Input Voltage
Pull-Up Current
VIH_SMOD#
VIL_SMOD#
IPLU
2
V
V
0.8
10
10
µA
ns
Propagation Delay SMOD#, GL
Transition from HIGH to LOW
tPD_SLGLL
PWM=GND
Propagation Delay SMOD#, GL
Transition from LOW to HIGH
tPD_SHGLH PWM=GND
10
ns
Thermal Warning Flag
Activation Temperature
Reset Temperature
TACT
TRST
150
135
30
°C
°C
Ω
Pull-Down Resistance
250ns Timeout Circuit
RTHWN
IPLD=5mA
Timeout Delay Between GH
Transition from HIGH to LOW
and GL Transition from LOW to
HIGH
tD_TIMEOUT SW=0V
250
ns
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ZSPM9060 Datasheet
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
High-Side Driver (fSW = 1000kHz, IOUT = 30A, TAMB = +25°C)
Output Impedance, Sourcing
Output Impedance, Sinking
Rise Time for GH=10% to 90%
Fall Time for GH=90% to 10%
RSOURCE_GH Source Current=100mA
RSINK_GH Sink Current=100mA
tR_GH
1
Ω
Ω
0.8
10
10
15
ns
ns
ns
tF_GH
LS to HS Deadband Time: GL
going LOW to GH going HIGH,
1.0V GL to 10% GH
tD_DEADON
PWM LOW Propagation Delay:
PWM going LOW to GH going
LOW, VIL_PWM to 90% GH
tPD_PLGHL
20
30
30
ns
ns
PWM HIGH Propagation Delay
with SMOD# Held LOW:
PWM going HIGH to GH going
HIGH, VIH_PWM to 10% GH
tPD_PHGHH SMOD# = LOW
ID_LS>0
Propagation Delay Exiting
Tri-state: PWM (from Tri-state)
going HIGH to GH going HIGH,
VIH_PWM to 10% GH
tPD_TSGHH
30
ns
Low-Side Driver (fSW = 1000kHz, IOUT = 30A, TAMB = +25°C)
Output Impedance, Sourcing
Output Impedance, Sinking
Rise Time for GL = 10% to 90%
Fall Time for GL = 90% to 10%
RSOURCE_GL Source Current=100mA
1
Ω
Ω
RSINK_GL
tR_GL
Sink Current=100mA
0.5
30
15
15
ns
ns
ns
tF_GL
HS to LS Deadband Time:
SW going LOW to GL going
HIGH, 2.2V SW to 10% GL
tD_DEADOFF
PWM-HIGH Propagation Delay:
PWM going HIGH to GL going
LOW, VIH_PWM to 90% GL
tPD_PHGLL
10
20
25
ns
ns
Propagation Delay Exiting
Tri-state: PWM (from Tri-state)
going LOW to GL going HIGH,
VIL_PWM to 10% GL
tPD_TSGLH
Boot Diode
Forward-Voltage Drop
Breakdown Voltage
VF
VR
IF=20mA
IR=1mA
0.3
V
V
22
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ZSPM9060 Datasheet
1.4. Typical Performance Characteristics
Test conditions: VIN=12V, VOUT=1.0V, VCIN=5V, VDRV=5V, LOUT=250nH, TAMB=25°C, and natural convection cool-
ing, unless otherwise specified.
Figure 1.1
Safe Operating Area
Figure 1.2
Module Power Loss vs. Output Current
60
55
50
45
40
35
30
25
20
15
10
11
10
9
300kHz
VIN = 12V, VDRV & VCIN = 5V, VOUT = 1V
500kHz
800kHz
1000kHz
FSW = 300kHz
8
7
6
FSW = 1000kHz
5
4
3
2
VIN = 12V, VDRV & VCIN = 5V, VOUT = 1V
1
5
0
0
0
5
10
15
20
25
30
35
40
45
50
55
0
25
50
75
100
125
150
Module Output Current, IOUT (A)
PCB Temperature, TPCB (°C)
Figure 1.3
Power Loss vs. Switching Frequency
Figure 1.4
Power Loss vs. Input Voltage
1.7
1.12
VIN = 12V, VDRV & VCIN = 5V, VOUT = 1V, IOUT = 30A
VDRV & VCIN = 5V, VOUT = 1V, FSW = 300kHz, IOUT = 30A
1.6
1.5
1.4
1.3
1.2
1.1
1.0
0.9
1.10
1.08
1.06
1.04
1.02
1.00
0.98
4
100 200 300 400 500 600 700 800 900 1000 1100
6
8
10
12
14
16
18
Module Switching Frequency, FSW (kHz)
Module Input Voltage, VIN (V)
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ZSPM9060 Datasheet
Figure 1.5
Power Loss vs. Driver Supply Voltage
Figure 1.6
Power Loss vs. Output Voltage
1.15
2.0
VIN = 12V, VOUT = 1V, FSW = 300kHz, IOUT = 30A
1.8
1.6
1.4
1.2
1.0
1.10
1.05
1.00
0.95
0.90
VIN = 12V, VDRV & VCIN = 5V, FSW = 300kHz, IOUT = 30A
0.8
0.5
4.0
4.5
5.0
5.5
6.0
1.0
1.5
2.0
2.5
3.0
3.5
4.0
Driver Supply Voltage, VDRV & VCIN (V)
Module Output Voltage, VOUT (V)
Figure 1.7
Power Loss vs. Output Inductance
Figure 1.8
Driver Supply Current vs. Switch Frequency
1.005
70
VIN = 12V, VDRV & VCIN = 5V, FSW = 300kHz, VOUT = 1V, IOUT = 30A
VIN = 12V, VDRV & VCIN = 5V, VOUT = 1V, IOUT = 0A
1.000
0.995
0.990
0.985
0.980
0.975
60
50
40
30
20
10
100 200 300 400 500 600 700 800 900 1000 1100
200
250
300
350
400
450
500
Module Switching Frequency, FSW (kHz)
Output Inductor, LOUT (nH)
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ZSPM9060 Datasheet
Figure 1.9
Driver Supply Current vs. Driver
Supply Voltage
Figure 1.10 Driver Supply Current vs. Output Current
26
1.03
VIN = 12V, VOUT = 1V, FSW = 300kHz, IOUT = 0A
VIN = 12V, VDRV & VCIN = 5V, VOUT = 1V
24
22
20
18
16
14
1.02
FSW = 300kHz
1.01
1.00
FSW = 1000kHz
0.99
0.98
0.97
0
5
10
15
20
25
30
35
40
45
50
55
4.0
4.5
5.0
5.5
6.0
Module Output Current, IOUT (A)
Driver Supply Voltage, VDRV & VCIN (V)
Figure 1.11 UVLO Threshold vs. Temperature
Figure 1.12 PWM Thresholds vs. Driver Supply Voltage
3.2
3.0
TA = 25°C
UVLOUP
3.1
VIH_PWM
2.5
3.0
2.9
2.8
2.7
VTRI_HI
2.0
VHIZ_PWM
1.5
VTRI_LO
VIL_PWM
1.0
UVLODN
125 150
2.6
0.5
-55
0
25
55
100
4.50
4.75
5.00
5.25
5.50
Driver IC Junction Temperature, TJ (oC)
Driver IC Supply Voltage, VCIN (V)
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ZSPM9060 Datasheet
Figure 1.13 PWM Threshold vs. Temperature
Figure 1.14 SMOD# Threshold vs. Driver Supply Voltage
3.0
2.2
TA = 25°C
VCIN = 5V
VIH_SMOD#
2.5
2.0
VIH_PWM
2.0
1.8
VTRI_HI
VHIZ_PWM
1.5
1.6
VIL_SMOD#
VTRI_LO
1.0
1.4
1.2
VIL_PWM
0.5
-55
0
25
55
100
125
150
4.50
4.75
5.00
5.25
5.50
Driver IC Junction Temperature, TJ (oC)
Driver IC Supply Voltage, VCIN (V)
Figure 1.15 SMOD# Thresholds vs. Temperature
Figure 1.16 SMOD# Pull-Up Current vs. Temperature
2.2
-9.0
VCIN = 5V
VCIN = 5V
-9.5
-10.0
-10.5
-11.0
-11.5
-12.0
2
VIH_SMOD#
1.8
1.6
VIL_SMOD#
1.4
1.2
-55
0
25
55
100
125
150
-55
0
25
55
100
125
150
Driver IC Junction Temperature, TJ (oC)
Driver IC Junction Temperature, TJ (oC)
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ZSPM9060 Datasheet
Figure 1.17 Disable (DISB#) Thresholds vs. Driver
Supply Voltage
Figure 1.18 Disable (DISB#) Thresholds vs.
Temperature
2.2
2.2
2.0
1.8
1.6
1.4
1.2
VCIN = 5V
TA = 25°C
VIH_DISB#
2.0
VIH_DISB#
1.8
1.6
VIL_DISB#
VIL_DISB#
1.4
1.2
-55
0
25
55
100
125
150
4.50
4.75
5.00
5.25
5.50
Driver IC Junction Temperature, TJ (oC)
Driver IC Supply Voltage, VCIN (V)
Figure 1.19 Disable Pull-Down Current vs. Temperature
Figure 1.20 Boot Diode Forward Voltage vs.
Temperature
12.0
500
VCIN = 5V
IF = 20mA
450
11.5
11.0
10.5
10.0
9.5
400
350
300
250
200
150
100
9.0
-55
0
25
55
100
125
150
-55
0
25
55
100
125
150
Driver IC Junction Temperature, TJ (oC)
Driver IC Junction Temperature, TJ (oC)
© 2016 Integrated Device Technology, Inc.
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ZSPM9060 Datasheet
2
Functional Description
The ZSPM9060 is a driver-plus-FET module optimized for the synchronous buck converter topology. A single
PWM input signal is all that is required to properly drive the high-side and the low-side MOSFETs. It is capable of
driving speeds up to 1MHz.
Figure 2.1
Typical Application Circuit with PWM Control
Open Drain Output
THWN#
VIN
VIN =3V to 16V
CVIN
TEMP
SENSE
V5V= 4.5V to 5.5V
DBoot
VDRV
VCIN
CGND
BOOT
CVDRV
RBOOT
(Q1)
HDRV
HS Power
MOSFET
CBOOT
LOUT
VOUT
PHASE
VSWH
PWM
SMOD#
DISB#
COUT
ZSPM9060
PWM
CONTROL
CONTROL
VCIN
Enabled
OFF
(Q2)
LS Power
MOSFET
LDRV
Disabled
ON
CGND
PGND
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ZSPM9060 Datasheet
Figure 2.2
ZSPM9060 Block Diagram
VDRV
BOOT
VIN
DBoot
UVLO
VCIN
(Q1)
HS Power
MOSFET
GH
GH
Logic
Level Shift
DISB#
GH
10µA
30k
VCIN
PHASE
VSWH
RUP_PWM
Dead Time
Control
Input
Tri-State
Logic
PWM
RDN_PWM
VDRV
(Q2)
LS Power
MOSFET
GL
30k
GL
Logic
THWN#
VCIN
GL
Temp
Sense
10µA
CGND
SMOD#
PGND
2.1. VDRV and Disable (DISB#)
The VCIN pin is monitored by an under-voltage lockout (UVLO) circuit. When VCIN rises above ~3.1V, the driver is
enabled. When VCIN falls below ~2.7V, the driver is disabled (GH, GL= 0; see Figure 2.2 and section 4.2). The
driver can also be disabled by pulling the DISB# pin LOW (DISB# < VIL_DISB), which holds both GL and GH LOW
regardless of the PWM input state. The driver can be enabled by raising the DISB# pin voltage HIGH (DISB# >
V
IH_DISB).
Table 2.1
Note: DISB# internal pull-down current source is 10µA (typical).
UVLO and Disable Logic
UVLO
DISB#
Driver State
0
1
1
1
X
0
Disabled (GH=0, GL=0)
Disabled (GH=0, GL=0)
Enabled (see Table 2.2 )
Disabled (GH=0, GL=0)
1
Open
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ZSPM9060 Datasheet
2.2. Thermal Warning Flag (THWN#)
The ZSPM9060 provides a thermal warning flag (THWN#) to indicate over-temperature conditions. The thermal
warning flag uses an open-drain output that pulls to CGND when the activation temperature (150°C) is reached.
The THWN# output returns to the high-impedance state once the temperature falls to the reset temperature
(135°C). For use, the THWN# output requires a pull-up resistor, which can be connected to VCIN. Note that
THWN# does NOT disable the DrMOS module.
Figure 2.3
Thermal Warning Flag (THWN) Operation
Reset
Activation
Temperature Temperature
High
Normal
Operation
Thermal
Warning
Low
135°C
150°C
TJ_driverIC
2.3. Tri-state PWM Input
The ZSPM9060 incorporates a tri-state 3.3V PWM input gate drive design. The tri-state gate drive has both logic
HIGH and LOW levels, with a tri-state shutdown voltage window. When the PWM input signal enters and remains
within the tri-state voltage window for a defined hold-off time (tD_HOLD-OFF), both GL and GH are pulled LOW. This
feature enables the gate drive to shut down both high and low side MOSFETs using only one control signal. For
example, this can be used for phase shedding in multi-phase voltage regulators.
When exiting a valid tri-state condition, the ZSPM9060 follows the PWM input command. If the PWM input goes
from tri-state to LOW, the low-side MOSFET is turned on. If the PWM input goes from tri-state to HIGH, the high-
side MOSFET is turned on, as illustrated in Figure 2.4. The ZSPM9060’s design allows for short propagation
delays when exiting the tri-state window (see section 1.3).
© 2016 Integrated Device Technology, Inc.
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ZSPM9060 Datasheet
Figure 2.4
PWM and Tri-State Timing Diagram
V
IH_PWM
V IH_PWM
V
IH_PWM
V
V
IH_PWM
TRI_HI
V
TRI_HI
tHOLD-OFF
VIL_PWM
V
V
TRI_LO
IL_PWM
tR_GH
t
GH
_
tF
PWM
90%
10%
GH
to
SWH
V
VIN
DCM
CCM
DCM
V
OUT
2.2V
VSWH
GL
t
R_GL
t
F_GL
90%
1.0V
90%
10%
1
0%
t
PD_PHGLL
t
PD_PLGHL
t
PD_TSGHH
t
HOLD-OFF
t
PD_TSGHH
t
HOLD-OFF
t
PD_TSGLH
t
D_DEADON
t
D_DEADOFF
Exit
Enter
Tri-state Tri-state
Exit
Enter
Exit
Enter
Tri-state
Tri-state
Tri-state
Tri-state
Notes:
tPD_xxx
tD_xxx
= Propagation delay from external signal (PWM, SMOD#, etc.) to IC generated signal; example: tPD_PHGLL = PWM going HIGH to LS VGS (GL) going LOW
= Delay from IC generated signal to IC generated signal; example: tD_DEADON = LS VGS LOW to HS VGS HIGH
PWM
Exiting Tri-state
tPD_PHGLL = PWM rise to LS VGS fall, VIH_PWM to 90% LS VGS
tPD_TSGHH
tPD_TSGLH
= PWM tri-state to HIGH to HS VGS rise, VIH_PWM to 10% HS VGS
= PWM tri-state to LOW to LS VGS rise, VIL_PWM to 10% LS VGS
tPD_PLGHL = PWM fall to HS VGS fall, VIL_PWM to 90% HS VGS
tPD_PHGHH = PWM rise to HS VGS rise, VIH_PWM to 10% HS VGS (assumes SMOD# held Low)
SMOD# (See Figure 2.5)
Dead Times
tPD_SLGLL = SMOD# fall to LS VGS fall, VIL_SMOD to 90% LS VGS
tPD_SHGLH = SMOD# rise to LS VGS rise, VIH_SMOD to 10% LS VGS
tD_DEADON = LS VGS fall to HS VGS rise, LS-comp trip value (~1.0V GL) to 10% HS VGS
tD_DEADOFF = VSWH fall to LS VGS rise, SW-comp trip value (~2.2V GL) to 10% LS VGS
CCM = Continuous Conduction Mode
DCM = Discontinuous Conduction Mode
© 2016 Integrated Device Technology, Inc.
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ZSPM9060 Datasheet
2.4. Adaptive Gate Drive Circuit
The low-side driver (GL) is designed to drive a ground-referenced low RDS(ON) N-channel MOSFET. The bias for
GL is internally connected between VDRV and CGND. When the driver is enabled, the driver's output is 180° out
of phase with the PWM input. When the driver is disabled (DISB#=0V), GL is held LOW.
The high-side driver (GH) is designed to drive a floating N-channel MOSFET. The bias voltage for the high-side
driver is developed by a bootstrap supply circuit consisting of the internal Schottky diode and external bootstrap
capacitor (CBOOT). During startup, the VSWH pin is held at PGND, allowing CBOOT (see section 3.2) to charge to
VDRV through the internal diode. When the PWM input goes HIGH, GH begins to charge the gate of Q1, the high-
side MOSFET. During this transition, the charge is removed from CBOOT and delivered to the gate of Q1. As Q1
turns on, VSWH rises to VIN, forcing the BOOT pin to VIN + VBOOT, which provides sufficient VGS enhancement for
Q1.
To complete the switching cycle, Q1 is turned off by pulling GH to VSWH. CBOOT is then recharged to VDRV when
VSWH falls to PGND. The GH output is in-phase with the PWM input. The high-side gate is held LOW when the
driver is disabled or the PWM signal is held within the tri-state window for longer than the tri-state hold-off time,
tD_HOLD-OFF
.
The driver IC design ensures minimum MOSFET dead time while eliminating potential shoot-through (cross-
conduction) currents. It senses the state of the MOSFETs and adjusts the gate drive adaptively to prevent
simultaneous conduction. Figure 2.4 provides the relevant timing waveforms. To prevent overlap during the LOW-
to-HIGH switching transition (Q2 off to Q1 on), the adaptive circuitry monitors the voltage at the GL pin. When the
PWM signal goes HIGH, Q2 begins to turn off after a propagation delay (tPD_PHGLL). Once the GL pin is discharged
below ~1V, Q1 begins to turn on after adaptive delay tD_DEADON
.
To prevent overlap during the HIGH-to-LOW transition (Q1 off to Q2 on), the adaptive circuitry monitors the
voltage at the GH-to-PHASE pin pair. When the PWM signal goes LOW, Q1 begins to turn off after a propagation
delay (tPD_PLGHL). Once the voltage across GH-to-PHASE falls below approximately 2.2V, Q2 begins to turn on
after adaptive delay tD_DEADOFF
.
2.5. Skip Mode (SMOD#)
The Skip Mode function allows higher converter efficiency under light-load conditions. When SMOD# is pulled
LOW, the low-side MOSFET gate signal is disabled (held LOW), preventing discharging of the output capacitors
as the filter inductor current attempts reverse current flow – also known as Diode Emulation Mode.
When the SMOD# pin is pulled HIGH, the synchronous buck converter works in Synchronous Mode. This mode
allows gating on the low-side MOSFET. When the SMOD# pin is pulled LOW, the low-side FET is gated off. See
the timing diagram in Figure 2.5 for further details. If the SMOD# pin is connected to the PWM controller, the
controller can actively enable or disable SMOD# when the controller detects light-load operation via output current
sensing. Normally the SMOD# pin is active LOW.
Table 2.2
SMOD# Logic
Note: The SMOD feature is intended to have a short propagation delay between the SMOD# signal and the low-side MOSFET VGS response
time to control diode emulation on a cycle-by-cycle basis.
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ZSPM9060 Datasheet
DISB#
PWM
SMOD#
GH
0
GL
0
0
1
1
1
1
1
X
X
X
0
0
1
1
Tri-State
0
0
0
1
0
1
0
0
1
0
0
1
1
0
Figure 2.5
SMOD# Timing Diagram
See Figure 2.4 for the definitions of the timing parameters.
SMOD#
VIH_SMOD
VIL_SMOD
VIH_PWM
VIH_PWM
VIL_PWM
PWM
90%
GH
to
VSWH
10%
10%
DCM
VOUT
CCM
CCM
2.2V
VSWH
GL
90%
1.0V
10%
10%
tPD_PLGHL
tPD_PHGLL
tPD_PHGHH
tPD_SHGLH
tPD_SLGLL
tD_DEADOFF
tD_DEADON
Delay from SMOD# going
LOW to LS VGS LOW
Delay from SMOD# going
HIGH to LS V HIGH
GS
HS turn-on with SMOD# LOW
© 2016 Integrated Device Technology, Inc.
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ZSPM9060 Datasheet
2.6. PWM
Figure 2.6
PWM Timing
V IH_PWM
VIL_PWM
PWM
GL
90%
1.0V
10%
90%
1.2V
GH
to
VSWH
10%
tD_TIMEOUT
(250ns Timeout)
2.2V
VSWH
tPD_PLGHL
tPD_PHGLL
tD_DEADOFF
tD_DEADON
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ZSPM9060 Datasheet
3
Application Design
3.1. Supply Capacitor Selection
For the supply inputs (VCIN and VDRV), a local ceramic bypass capacitor is required to reduce noise and is used
to supply the peak transient currents during gate drive switching action. Recommendation: use at least a 1µF
capacitor with an X7R or X5R dielectric. Keep this capacitor close to the VCIN and VDRV pins, and connect it to
the CGND ground plane with vias.
3.2. Bootstrap Circuit
The bootstrap circuit uses a charge storage capacitor (CBOOT), as shown in Figure 3.1. A bootstrap capacitance of
100nF using a X7R or X5R capacitor is typically adequate. A series bootstrap resistor might be needed for
specific applications to improve switching noise immunity. The boot resistor might be required when operating
with VIN above 15V, and it is effective at controlling the high-side MOSFET turn-on slew rate and VSWH overshoot.
Typically, RBOOT values from 0.5Ω to 3.0Ω are effective in reducing VSWH overshoot.
3.3. VCIN Filter
The VDRV pin provides power to the gate drive of the high-side and low-side power MOSFETs. In most cases,
VDRV can be connected directly to VCIN, which supplies power to the logic circuitry of the gate driver. For additional
noise immunity, an RC filter can be inserted between VDRV and VCIN. Recommendation: use a 10Ω resistor (RVCIN
)
between VDRV and VCIN and a 1µF capacitor (CVCIN) from VCIN to CGND (see Figure 3.1).
Figure 3.1
VCIN Filter Block Diagram
Note: Blue lines indicate the optional recommended filter.
Open Drain Output
VIN
A
IIN
THWN#
VIN
CVIN
I5V
V5V
VDRV
A
BOOT
RVCIN
CVDRV
RBOOT
VCIN
CVCIN
CBOOT
ZSPM9060
IOUT
VOUT
LOUT
PWM
SMOD#
DISB#
PWM Input
A
PHASE
VSWH
OFF
ON
COUT
DISB
VSW
v
PGND
CGND
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ZSPM9060 Datasheet
Figure 3.2
Power Loss Measurement Block Diagram
Open Drain Output
VIN
A
IIN
THWN#
VIN
CVIN
I5V
V5V
VDRV
VCIN
A
BOOT
CVDRV
RBOOT
CBOOT
ZSPM9060
IOUT
VOUT
LOUT
PWM
SMOD#
DISB#
PWM Input
A
PHASE
VSWH
OFF
ON
COUT
DISB
VSW
v
PGND
CGND
3.4. Power Loss and Efficiency Testing Procedures
The circuit in Figure 3.2 has been used to measure power losses in the following example. The efficiency has
been calculated based on equations (1) to (7).
Power loss calculations in Watts:
P
=
(
VIN ∗IIN
)
+
(
V5V ∗I5V
)
(1)
(2)
IN
PSW
=
(
VSW ∗IOUT
)
POUT
=
(
VOUT ∗IOUT
)
(3)
(4)
(5)
PLOSS_MODULE
=
(
P −PSW
)
IN
PLOSS_BOARD
=
(
P −POUT
)
IN
© 2016 Integrated Device Technology, Inc.
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ZSPM9060 Datasheet
Efficiency calculations:
PSW
EFFMODULE = 100∗
%
%
(6)
(7)
P
IN
POUT
EFFBOARD = 100∗
P
IN
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ZSPM9060 Datasheet
4
Pin Configuration and Package
4.1. Available Packages
The ZSPM9060 is available in a 40-lead clip-bond PQFN package. The pin-out is shown in Figure 4.1. See
Figure 4.2 for the mechanical drawing of the package.
Figure 4.1
Pin-out PQFN40 Package
1
2
3
4
5
6
7
8
9
10
10
9
8
7
6
5
4
3
2
1
PWM
VIN
VIN
VIN
PWM
DISB#
THWN
CGND
GL
VIN
DISB#
THWN
CGND
GL
CGND
41
VIN
42
VIN
42
CGND
41
VIN
VIN
VIN
VIN
VSWH
PGND
PGND
PGND
PGND
PGND
VSWH
PGND
PGND
PGND
PGND
PGND
VSWH
VSWH
VSWH
VSWH
VSWH
VSWH
VSWH
VSWH
VSWH
VSWH
VSWH
43
VSWH
43
21 22 23 24 25 26 27 28 29 30
30 29 28 27 26 25 24 23 22 21
Top View
Bottom View
© 2016 Integrated Device Technology, Inc.
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ZSPM9060 Datasheet
4.2. Pin Description
Pin
Name
Description
When SMOD#=HIGH, the low-side driver is the inverse of PWM input. When SMOD#=LOW,
1
SMOD# the low-side driver is disabled. This pin has a 10µA internal pull-up current source. Do not add
a noise filter capacitor.
2
3
VCIN
IC bias supply. A 1µF (minimum) ceramic capacitor is recommended from this pin to CGND.
Power for gate driver. A 1µF (minimum) X5R/X7R ceramic capacitor from this pin to CGND is
recommended. Place it as close as possible to this pin.
VDRV
Bootstrap supply input. Provides voltage supply to the high-side MOSFET driver. Connect a
bootstrap capacitor from this pin to PHASE.
4
BOOT
5, 37, 41
CGND
GH
IC ground. Ground return for driver IC.
6
7
Gate high. For manufacturing test only. This pin must float: it must not be connected.
PHASE Switch node pin for bootstrap capacitor routing; electrically shorted to VSWH pin.
No connection. The pin is not electrically connected internally but can be connected to VIN for
convenience.
8
NC
9 - 14, 42
VIN
Input power voltage (output stage supply voltage).
Switch node. Provides return for high-side bootstrapped driver and acts as a sense point for
the adaptive shoot-through protection.
15, 29 - 35, 43
VSWH
16 – 28
36
PGND
GL
Power ground (output stage ground). Source pin of the low-side MOSFET.
Gate low. For manufacturing test only. This pin must float. It must not be connected.
Thermal warning flag, open collector output. When temperature exceeds the trip limit, the
output is pulled LOW. THWN# does not disable the module.
38
THWN#
Output disable. When LOW, this pin disables the power MOSFET switching (GH and GL are
held LOW). This pin has a 10µA internal pull-down current source. Do not add a noise filter
capacitor.
39
40
DISB#
PWM
PWM signal input. This pin accepts a tri-state 3.3V PWM signal from the controller.
© 2016 Integrated Device Technology, Inc.
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ZSPM9060 Datasheet
4.3. Package Dimensions
Figure 4.2
Clip-Bond PQFN40 Physical Dimensions and Recommended Footprint
© 2016 Integrated Device Technology, Inc.
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January 27, 2016
ZSPM9060 Datasheet
5
Circuit Board Layout Considerations
Figure 5.1 provides an example of a proper layout for the ZSPM9060 and critical components. All of the high-
current paths, such as the VIN, VSWH, VOUT, and GND copper traces, should be short and wide for low inductance
and resistance. This technique achieves a more stable and evenly distributed current flow, along with enhanced
heat radiation and system performance.
The following guidelines are recommendations for the printed circuit board (PCB) designer:
1. Input ceramic bypass capacitors must be placed close to the VIN and PGND pins. This helps reduce the high-
current power loop inductance and the input current ripple induced by the power MOSFET switching
operation.
2. The VSWH copper trace serves two purposes. In addition to being the high-frequency current path from the
DrMOS package to the output inductor, it also serves as a heat sink for the low-side MOSFET in the DrMOS
package. The trace should be short and wide enough to present a low-impedance path for the high-
frequency, high-current flow between the DrMOS and inductor to minimize losses and DrMOS temperature
rise. Note that the VSWH node is a high-voltage and high-frequency switching node with a high noise
potential. Care should be taken to minimize coupling to adjacent traces. Since this copper trace also acts as a
heat sink for the lower MOSFET, the designer must balance using the largest area possible to improve
DrMOS cooling with maintaining acceptable noise emission.
3. Locate the output inductor close to the ZSPM9060 to minimize the power loss due to the VSWH copper trace.
Care should also be taken so that the inductor dissipation does not heat the DrMOS.
4. The power MOSFETs used in the output stage are effective for minimizing ringing due to fast switching. In
most cases, no VSWH snubber is required. If a snubber is used, it should be placed close to the VSWH and
PGND pins. The resistor and capacitor must be the proper size for the power dissipation.
5. VCIN, VDRV, and BOOT capacitors should be placed as close as possible the VCIN-to-CGND, VDRV-to-
CGND, and BOOT-to-PHASE pin pairs to ensure clean and stable power. Routing width and length should be
considered as well.
6. Include a trace from PHASE to VSWH to improve the noise margin. Keep the trace as short as possible.
7. The layout should include a placeholder to insert a small-value series boot resistor (RBOOT) between the boot
capacitor (CBOOT) and the ZSPM9060 BOOT pin. The boot-loop size, including RBOOT and CBOOT, should be as
small as possible. The boot resistor may be required when operating with VIN above 15V. The boot resistor is
effective for controlling the high-side MOSFET turn-on slew rate and VSWH overshoot. RBOOT can improve the
noise operating margin in synchronous buck designs that might have noise issues due to ground bounce or
high positive and negative VSWH ringing. However, inserting a boot resistance lowers the DrMOS efficiency.
Efficiency versus noise trade-offs must be considered. RBOOT values from 0.5Ω to 3.0Ω are typically effective
in reducing VSWH overshoot.
8. The VIN and PGND pins handle large current transients with frequency components greater than 100MHz. If
possible, these pins should be connected directly to the VIN and board GND planes. Important: the use of
thermal relief traces in series with these pins is discouraged since this adds inductance to the power path.
Added inductance in series with the VIN or PGND pin degrades system noise immunity by increasing positive
and
negative
VSWH
ringing.
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ZSPM9060 Datasheet
9. Connect the CGND pad and PGND pins to the GND plane copper with multiple vias for stable grounding.
Poor grounding can create a noise transient offset voltage level between CGND and PGND. This could lead
to faulty operation of the gate driver and MOSFETs.
10. Ringing at the BOOT pin is most effectively controlled by close placement of the boot capacitor. Do not add
an additional BOOT to PGND capacitor; this could lead to excess current flow through the BOOT diode.
11. The SMOD# and DISB# pins have weak internal pull-up and pull-down current sources, respectively. Do NOT
float these pins if avoidable. These pins should not have any noise filter capacitors.
12. Use multiple vias on each copper area to interconnect top, inner, and bottom layers to help distribute current
flow and heat conduction. Vias should be relatively large and of reasonably low inductance. Critical high
frequency components, such as RBOOT, CBOOT, the RC snubber, and the bypass capacitors should be located
as close to the respective DrMOS module pins as possible on the top layer of the PCB. If this is not feasible,
they should be connected from the backside through a network of low-inductance vias. Critical high-frequency
components, such as RBOOT, CBOOT, RC snubber, and bypass capacitors, should be located as close to the
respective ZSPM9060 module pins as possible on the top layer of the PCB. If this is not feasible, they can be
connected from the backside through a network of low-inductance vias.
Figure 5.1
PCB Layout Example
Top View
Bottom View
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ZSPM9060 Datasheet
6
Glossary
Term
Description
CCM
DCM
DISB
HS
Continuous Conduction Mode
Discontinuous Conduction Mode
Driver Disable
High Side
LS
Low Side
SMOD
THWN
Skip Mode Disable
Thermal Warning Flag
7
Ordering Information
Product Sales Code Description
Package
ZSPM9060ZA1R
ZSPM8060-KIT
ZSPM9060 RoHS-Compliant Clip-Bond PQFN40 - Temperature range: -40°C to +125°C Reel
Open-Loop Evaluation Board for ZSPM9060
Circuit
Board
8
Related Documents
Document
ZSPM8060-KIT Open-Loop Evaluation
Board User Guide
Visit IDT’s website www.IDT.com or contact your nearest sales office for the latest version of these documents.
© 2016 Integrated Device Technology, Inc.
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January 27, 2016
ZSPM9060 Datasheet
9
Document Revision History
Revision
1.00
Date
Description
October 24, 2012
March 8, 2013
First release
1.01
Minor edits and updates for imagery on cover and headers. Update for contact
information.
January 27, 2016
Changed to IDT branding.
Corporate Headquarters
Sales
Tech Support
www.IDT.com/go/support
6024 Silver Creek Valley Road
San Jose, CA 95138
www.IDT.com
1-800-345-7015 or 408-284-8200
Fax: 408-284-2775
www.IDT.com/go/sales
DISCLAIMER Integrated Device Technology, Inc. (IDT) reserves the right to modify the products and/or specifications described herein at any time, without notice, at IDT's sole discretion. Performance
specifications and operating parameters of the described products are determined in an independent state and are not guaranteed to perform the same way when installed in customer products. The
information contained herein is provided without representation or warranty of any kind, whether express or implied, including, but not limited to, the suitability of IDT's products for any particular purpose, an
implied warranty of merchantability, or non-infringement of the intellectual property rights of others. This document is presented only as a guide and does not convey any license under intellectual property
rights of IDT or any third parties.
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© 2016 Integrated Device Technology, Inc.
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