CALMIRCO CMPWR330 400ma smartor dual regulator with v switchã Datasheet

CMPWR330
CALIFORNIA MICRO DEVICES
400mA SmartORTM Dual Regulator with VAUX Switch
Features
Applications
• Continuous 3.3V output from three inputs
• PCI adapter cards with Wake-On-LAN
• Complete power management solution
• Network Interface Cards (NICs)
• V CC, VSBY regulator supplies 400mA output
• Multiple power systems
• Built-in hysteresis when selecting input supplies
• Systems with standby capabilities
• Integrated switch has very low R DS(ON) 0.25Ω (TYP)
• Foldback current limiting protection
• Thermal overload shutdown protection
• 8-pin power SOIC package
Product Description
The CMPWR330 is a dual input regulator with a fully
integrated VAUX switch capable of delivering up to
400mA continuously at 3.3V. The output power is
provided from three independent input voltage sources
on a prioritized basis. Power is always taken in priority
using the following order VCC, VSBY, and VAUX.
When VCC (5V) or VSBY is present, the device automatically enables the regulator and produces a stable 3.3V
output at VOUT.
When only VAUX (3.3V) is present, the device provides a
low impedance direct connection (0.25Ω TYP) from VAUX
to VOUT.
All the necessary control circuitry needed to provide a
smooth and automatic transition between all three
supplies has been incorporated. This allows the VCC
input supply to be dynamically switched without loss of
output voltage.
PIN DIAGRAM AND ELECTRICAL SCHEMATIC
Top View
VSBY
1
8
GND
VCC
2
7
GND
VOUT
3
6
GND
VAUX
4
5
GND
VSBY
+
5V
–
1µF
CMPWR330
GND
CMPWR330
8-Pin Power SOIC
VSBY
VCC
VCC
+
5V
–
VOUT
VAUX
GND
1µF
+
–
Pin Diagram
VOUT
3.3V
400mA
VAUX
3.3V
10µF
GND
Typical Application Circuit
STANDARD PART ORDERING INFORMATION
Package
Pins
8
Style
Power SOIC
Ordering Part Number
Tubes
Tape & Reel
CMPWR330SA/T
CMPWR330SA/R
C1680101
©2001 California Micro Devices Corp. All rights reserved. Smart OR™ is a trademark of California Micro Devices.
215 Topaz Street, Milpitas, California 95035 3/6/2001
Tel: (408) 263-3214
Part Marking
CMPWR330SA
Fax: (408) 263-7846
www.calmicro.com
1
CMPWR330
CALIFORNIA MICRO DEVICES
ABSOLUTE MAXIMUM RATINGS
Parameter
ESD Protection (HBM)
VCC, VSBY Input Voltage
VAUX Input Voltage
Temperature: Storage
Operating Ambient
Operating Junction
Power Dissipation: (Note 1)
Rating
2000
6.0, GND –0.5
4.0, GND –0.5
–40 to 150
0 to 70
0 to 125
Internally Limited
Unit
V
V
V
°C
°C
°C
W
OPERATING CONDITIONS
Range
Unit
VCC , VSBY
Parameter
5 ± 0.25
V
VAUX
3.3 ± 0.3
V
0 to 70
°C
0 to 400
mA
10 ± 20%
µF
Temperature (Ambient)
Load Current
CEXT
ELECTRICAL OPERATING CHARACTERISTICS
(over operating conditions unless specified otherwise)
Symbol
VOUT
Parameter
Regulator Output Voltage
ILIM
Regulator Current Limit
Conditions
0mA < ILOAD < 400mA
MIN
3.135
TYP
3.30
MAX
3.465
UNIT
V
500
mA
IS/C
Short Circuit Current
VCC/SBY = 5V, Vout = 0V
150
mA
VR LOAD
Load Regulation
VCC = 5V, ILOAD = 5 to 400mA
20
mV
VR LINE
Line Regulation
VCC = 4.5V to 5.5V, ILOAD = 5mA
VCCSEL
VCC Select Voltage
VSBY or VAUX present
VCCDES
VCC Deselect Voltage
VSBY or VAUX present
VHYST
Hysteresis Voltage (Note 2)
VSBY or VAUX present
2
4.40
4.00
mV
4.60
V
4.20
V
0.20
V
0.25
0.4
Ω
5
100
µA
VCC > VCCSEL, ILOAD = 0mA
0.8
1.5
mA
VCC < VCCDES, ILOAD = 0mA
0.8
1.5
mA
VAUX Supply Current
VAUX is selected, ILOAD = 0mA
0.2
0.30
mA
Ground Current
VAUX is selected, (vCC/SBY = 0V)
0.2
0.30
mA
VCC/SBY = 5V, ILOAD = 0mA
0.8
1.5
mA
VCC/SBY = 5V, ILOAD = 400mA
1.0
2.0
mA
RSW
VAUX Switch Resistance
IRCC
VCC Reverse Leakage
IRSBY
VSBY Reverse Leakage
IRAUX
VAUX Reverse Leakage
ICC
VCC Supply Current
ISBY
VSBY Supply Current
IAUX
IGND
One supply input taken to
ground while the others remain
at nominal voltage
TDISABLE
Shutdown Temperature
160
°C
THYST
Thermal Hysteresis
20
°C
Note 1: At rated load, the power dissipation will be 0.68W (1.7V x 0.4A). Under these conditions, (in a 70°C ambient), the thermal
resistance from junction to ambient (θJA) must not exceed 80°C/W. This is typically achieved with 2 square inches of copper printed
circuit board area connected to the GND pins for heat spreading, or equivalent.
Note 2: The disturbance on VCC during supply changeover should be kept below the hysteresis voltage to prevent any chatter. The source
resistance on the VCC supply should be kept to less than 0.3Ω to ensure precise switching.
©2001 California Micro Devices Corp. All rights reserved. Smart OR™ is a trademark of California Micro Devices.
2
215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214
Fax: (408) 263-7846
www.calmicro.com
3/6/2001
CMPWR330
CALIFORNIA MICRO DEVICES
Interface Signals
VCC is a positive input supply for the voltage regulator.
Whenever this supply voltage exceeds the VCCSEL level
(4.4V), it will immediately be given priority and be used
to power the regulator output. If this supply voltage falls
below the VCCDES level (4.2V) it will immediately be
deselected and no longer provide power for the regulator output. An internal hysteresis voltage of 0.2V is used
to prevent any chatter during selection and deselection
of VCC. The effective source impedance of VCC should be
kept below 0.3Ω to ensure changeover disturbances do
not exceed the hysteresis level.
If the VSBY connection is made within a few inches of the
main input filter, a bypass capacitor may not be necessary. Otherwise a bypass filter capacitor in the range of
1µF to 10µF will ensure adequate filtering.
VAUX is the auxiliary voltage power source. This supply is
selected only when VCC falls below 4.2V and the VSBY is
not present. Under these conditions an internal switch is
enabled and provides a very low impedance connection
directly between VOUT and VAUX.
VOUT is the output voltage. Power is provided from the
regulator or via the low impedance auxiliary switch. This
output requires a capacitance of 10µF to ensure regulator stability and minimize the peak output disturbance
during power supply changeover.
If the connection to VCC is made within a few inches of
the main input filter, a bypass capacitor may not be
necessary. Otherwise a bypass filter capacitor in the
range of 1µF to 10µF will ensure adequate filtering.
GND provides the reference for all voltages.
VSBY is the standby input supply (5V), which is immediately used to power the regulator output whenever VCC is
below the deselect level (4.2V).
INTERFACE SIGNALS
Pin
Symbol
Description
1
VSYB
Standby supply voltage (5V) input for regulator whenever VCC falls below 4.2V.
2
VCC
Primary supply voltage (5V) input for regulator
3
VOUT
Regulator voltage output (3.3V) regulator when either VCC or VSYB is present
4
VAUX
Auxiliary supply voltage (3.3V) input for low impedance switch
5-8
GND
Reference for all voltages
5VSBY
5VCC
CONTROLLER
+
+
SELECT (VCC /V SBY)
ENABLE
–
AUXSW
VDESELECT
4.2V
AUXSW
0.25Ω
+
VREF
3.3V
VCC
–
VSBY
REGULATOR AMP
3.3VAUX
GND
VOUT
3.3V
400mA
GND
Simplified Electrical Schematic
©2001 California Micro Devices Corp. All rights reserved. Smart OR™ is a trademark of California Micro Devices.
215 Topaz Street, Milpitas, California 95035 3/6/2001
Tel: (408) 263-3214
Fax: (408) 263-7846
www.calmicro.com
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CMPWR330
CALIFORNIA MICRO DEVICES
1.0
1.0
0.9
0.9
0.8
0.8
Supply Current (mA)
Supply Current (mA)
Typical DC Characteristics (nominal conditions unless specified otherwise)
0.7
0.6
0.5
0.4
0.3
0.7
0.6
0.5
0.4
0.3
0.2
0.2
0.1
0.0
0.1
0.0
0
1
2
3
4
5
6
0
1
2
VCC Input Voltage (V)
5
6
Figure 2. VSBY Supply Current vs Voltage
0.5
1.2
1.1
Ground Current (mA)
0.4
Supply Current (mA)
4
VSBY Input Voltage (V)
Figure 1. VCC Supply Current vs Voltage
0.3
0.2
0.1
1.0
0.9
0.8
0.7
0.0
0
1
2
3
0.6
4
0
100
VAUX Input Voltage (V)
300
400
Figure 4. Ground Current vs Output Load
3.4
Regulator Output Voltage (V)
3.4
3.3
3.2
3.1
3.0
3.5
200
Load Current (mA)
Figure 3. VAUX Supply Current vs Voltage
Regulator Output Voltage (V)
3
4
4.5
5
5.5
6
3.3
3.2
3.1
3.0
3.5
4
4.5
5
5.5
6
Line Voltage (V)
Line Voltage (V)
Figure 5. Line Regulation (5mA Load)
Figure 6. Line Regulation (400mA Load)
©2001 California Micro Devices Corp. All rights reserved. Smart OR™ is a trademark of California Micro Devices.
4
215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214
Fax: (408) 263-7846
www.calmicro.com
3/6/2001
CMPWR330
CALIFORNIA MICRO DEVICES
Typical DC Characteristics
4.0
3.40
Regulator Output Voltage (V)
Regulator Output Voltage (V)
3.45
3.35
3.30
3.25
3.20
3.15
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
100
200
300
400
500
600
0
100
Load Current (mA)
200
300
400
500
600
Output Current (mA)
Figure 7. Load Regulation (5V Supply)
Figure 8. Foldback Current Limit Protection
0.40
1.2
ON Resisitance (Ω)
Dropout Voltage (V)
1.0
0.8
0.6
0.4
0.35
0.30
0.25
0.2
0.0
0
100
200
300
0.20
3.0
400
Load Current (mA)
3.1
3.2
3.3
3.4
3.5
3.6
VAUX INPUT VOLTAGE (V)
Figure 9. Regulator Dropout Characteristics
Figure 10. Switch Resistance vs VAUX Supply
©2001 California Micro Devices Corp. All rights reserved. Smart OR™ is a trademark of California Micro Devices.
215 Topaz Street, Milpitas, California 95035 3/6/2001
Tel: (408) 263-3214
Fax: (408) 263-7846
www.calmicro.com
5
CMPWR330
CALIFORNIA MICRO DEVICES
Typical Transient Characteristics (Supply source resistance set to 0.2Ω)
Tek Run: 25kS/s
Sample
25kS/s
Tek
1 Acqs
VCC
VCC
VOUT
Ch1
1V
1V
M 2ms Ch2
VOUT
4.48V
Figure 11. VCC Cold Start (Load = 400mA)
Tek Run: 25kS/s
1V
Ch1
1V
M 2ms Ch2
1.44V
Figure 12. VCC Full Power Down (Load = 400mA)
Tek Run: 25kS/s Sample
Sample
VSBY
VSYB
VOUT
VOUT
Ch1
1V
1V
M 2ms Ch1
1.02V
Ch1
Figure 13. VSBY Cold Start (Load = 400mA)
Tek Run: 25kS/s
1V
1V
M 2ms Ch2
3.56V
Figure 14. VSBY Full Power Down (Load = 400mA)
Sample
Tek Run: 25kS/s
VAUX
Sample
VAUX
VOUT
VOUT
1
1
Ch1
1V
1V
M 2ms Ch1
1.26V
Ch1
Figure 15. VAUX Cold Start (Load = 400mA)
1V
1V
M 2ms Ch1
2.60V
Figure 16. VAUX Full Power Down (Load = 400mA)
©2001 California Micro Devices Corp. All rights reserved. Smart OR™ is a trademark of California Micro Devices.
6
215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214
Fax: (408) 263-7846
www.calmicro.com
3/6/2001
CMPWR330
CALIFORNIA MICRO DEVICES
Typical Transient Characteristics (VCC source resistance set to 0.2Ω)
Tek Run: 2.5MS/s Sample
Tek Run: 2.5MS/s Sample
VSBY (offset = 5V)
3
3
VSBY (offset = 5V)
VCC (offset = 4.5V)
VCC (offset = 4.5V)
1
1
VOUT (offset = 3.3V)
Ch1 100mV
Ch3 100mV
VOUT (offset = 3.3V)
100mV M 20µs Ch2
4.46V
Ch1 100mV
Ch3 100mV
Figure 17. VCC Power Up (VSBY = 5V, Load = 300mA)
100mV M 20µs Ch2
4.32V
Figure 18. VCC Power Down (VSBY = 5V, Load = 300mA)
Tek Run: 2.5MS/s Sample
Tek Run: 2.5MS/s Sample
VCC (offset = 4.5V)
2
VCC (offset = 4.5V)
1
VOUT (offset = 3.3V)
Ch1 100mV
VOUT (offset = 3.3V)
100mV M 20µs Ch2
Ch1 100mV
4.44V
Figure 19. VCC Power Up (VAUX = 3.3V, Load = 300mA)
Tek
100mV M 20µs Ch2
4.31V
Figure 20. VCC Power Down (VAUX = 3.3V, Load = 300mA)
10MS/s 2 Acqs
Tek Run: 500kS/s Sample
5.5V
Load
360mA
2
VCC
40mA
4.5V
VOUT (offset = 3.3V)
1
VOUT (offset = 3.3V)
(5mA Load)
Ch1 50mV
2V
M 5µs
Ch3
3.50V
20mV
Figure 21. Load Transient Response (10% - 90% Rated)
Ch2 500mV M 100µs Ch2
5V
Figure 22. Line Transient (1Vpp) Response
©2001 California Micro Devices Corp. All rights reserved. Smart OR™ is a trademark of California Micro Devices.
215 Topaz Street, Milpitas, California 95035 3/6/2001
Tel: (408) 263-3214
Fax: (408) 263-7846
www.calmicro.com
7
CMPWR330
CALIFORNIA MICRO DEVICES
Typical Thermal Characteristics
3.32
Regulator Output Voltage (V)
The overall junction to ambient thermal resistance (θJA)
for device power dissipation (PD) consists primarily of
two paths in series. The first path is the junction to the
case (θJC) which is defined by the package style, and the
second path is case to ambient (θCA) thermal resistance
which is dependent on board layout. The final operating
junction temperature for any set of conditions can be
estimated by the following thermal equation:
TJUNC = TAMB + PD (θJC ) + PD (θCA )
3.31
3.30
3.29
3.28
20
= TAMB + PD (θJA)
30
40
50
60
70
Temperature (˚C)
The CMPWR330 uses a thermally enhanced package
where all the GND pins (5 through 8) are integral to the
leadframe. When this package is mounted on a double
sided printed circuit board with two square inches of
copper allocated for “heat spreading”, the resulting θJA is
50°C/W.
Figure 23. VOUT Variation with TAMB (400mA Load)T
4.55
VSELECT
4.50
Threshold Voltage (V)
Based on a maximum power dissipation of 0.7W
(1.75V x 0.4A) with an ambient of 70°C the resulting
junction temperature will be:
TJUNC = TAMB + PD (θJA )
= 70°C + 0.7W (50°C/W)
4.45
4.40
4.35
4.30
VDESELECT
4.25
= 70°C + 35°C = 105°C
4.20
25
Thermal characteristics were measured using a double
sided board with two square inches of copper area
connected to the GND pins for “heat spreading”.
50
75
100
125
150
Temperature (˚C)
Figure 24. Select/Deselect Threshold Variation with TJUNC
Measurements showing performance up to junction
temperature of 125°C were performed under light load
conditions (5mA). This allows the ambient temperature
to be representative of the internal junction temperature.
0.35
ON Resistance (Ω)
Note: The use of multi-layer board construction with
separate ground and power planes will further enhance
the overall thermal performance. In the event of no
copper area being dedicated for heat spreading, a multilayer board construction, using only the minimum size
pad layout, will typically provide the CMPWR330 with an
overall θJA of 70°C/W which allows up to 780mW to be
safely dissipated.
0.37
0.33
0.31
0.29
0.27
0.25
20
30
40
50
60
70
Temperature (˚C)
Figure 25. VAUX Switch Resistance vs TAMB
©2001 California Micro Devices Corp. All rights reserved. Smart OR™ is a trademark of California Micro Devices.
8
215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214
Fax: (408) 263-7846
www.calmicro.com
3/6/2001