View EP5358HUI_4660712.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

EP5358LUI/EP5358HUI
500mA Synchronous Buck Regulator with Integrated Inductor
RoHS Compliant; Halogen Free
Description
The EP5358xUI (x = L or H) is a 500mA PowerSOC. The EP5358xUI integrates MOSFET switches, control, compensation, and the magnetics in an advanced 2.5mm x 2.25mm micro-QFN Package. Integrated magnetics enables a tiny solution footprint, low output ripple, low part-count, and high reliability, while maintaining high efficiency. The complete solution can be implemented in as little as 15mm2. The EP5358xUI uses a 3-pin VID to easily select the output voltage setting. Output voltage settings are available in 2 optimized ranges providing coverage for typical VOUT settings. The VID pins can be changed on the fly for fast dynamic voltage scaling. EP5358LUI further has the option to use an external voltage divider. The EP5358xUI is a perfect solution for noise sensitive and space constrained applications that require high efficiency.
Features
* * * * * * * * * * * * * Integrated Inductor Technology 2.5mm x 2.25mm x 1.1mm uQFN package Total Solution Footprint < 15mm2 Low VOUT ripple for RF compatibility High efficiency, up to 93% 500mA continuous output current Less than 1A standby current 5 MHz switching frequency 3 pin VID for glitch free voltage scaling VOUT Range 0.6V to VIN - 0.25V Short circuit and over current protection UVLO and thermal protection IC level reliability in a PowerSOC solution
Application
* * * * Wireless and RF applications Wireless broad band data cards Smart phone and portable media players Advanced Low Power Processors, DSP, IO, Memory, Video, Multimedia Engines
VIN AVIN PVIN ENABLE 2.2uF VSENSE VOUT VOUT
5.4 mm
Input Cap 2.2uF 0603
EP5358HUI
VS0 VS1 VS2
10uF
2.7 mm
EN5358xUI
Output Cap 10uF 0603
PGND
AGND
Figure 1: Total Solution Footprint (Not to Scale)
Figure 2: Typical Application Schematic
www.enpirion.com
03541 5/29/2009 Rev:A
EP5358LUI/EP5358HUI
Ordering Information
Pin Assignments (Top View)
NC(SW) NC(SW)
15 14
Part Number EP5358LUI EP5358HUI EP5358LUI-E EP5358HUI-E
Comment LOW VID Range HIGH VID Range
Package 16-pin QFN T&R 16-pin QFN T&R
NC(SW) PGND PGND VFB VSENSE AGND
1
16
PVIN AVIN
2 3 4 5 6
EP5358LUI
13
EP5358LUI Evaluation Board EP5358HUI Evaluation Board
12 ENABLE 11
VS0
10 VS1 9
VS2
7
8
VOUT NC(SW)
16
Figure 3: EP5358LUI Pin Out Diagram (Top View)
NC(SW)
15 14
NC(SW) PGND PGND NC VSENSE AGND
VOUT
1
PVIN AVIN
2 3 4 5 6
EP5358HUI
13
12 ENABLE 11
VS0
10 VS1 9
VS2
7
8
VOUT
Figure 4: EP5358HUI Pin Out Diagram (Top View)
Pin Description
PIN
1, 15, 16 2,3 4 5 6 7, 8 9, 10, 11
NAME
NC(SW) PGND VFB/NC VSENSE AGND VOUT VS2, VS1, VS0
FUNCTION
NO CONNECT - These pins are internally connected to the common switching node of the internal MOSFETs. NC (SW) pins are not to be electrically connected to any external signal, ground, or voltage. However, they must be soldered to the PCB. Failure to follow this guideline may result in part malfunction or damage to the device. Power ground. Connect this pin to the ground electrode of the Input and output filter capacitors. EP5358LUI: Feed back pin for external divider option. EP5358HUI: No Connect Sense pin for preset output voltages. Refer to application section for proper configuration. Analog ground. This is the quiet ground for the internal control circuitry, and the ground return for external feedback voltage divider Regulated Output Voltage. Refer to application section for proper layout and decoupling. Output voltage select. VS2 = pin 9, VS1 = pin 10, VS0 = pin 11. EP5358LUI: Selects one of seven preset output voltages or an external resistor divider. EP5358HUI: Selects one of eight preset output voltages. (Refer to section on output voltage select for more details.) 2
5/29/2009
VOUT
(c)Enpirion 2009 all rights reserved, E&OE
03541
www.enpirion.com
Rev:A
EP5358LUI/EP5358HUI PIN
12 13 14
NAME
ENABLE AVIN PVIN
FUNCTION
Output Enable. Enable = logic high; Disable = logic low Input power supply for the controller circuitry. Input Voltage for the MOSFET switches.
Absolute Maximum Ratings
CAUTION: Absolute Maximum ratings are stress ratings only. Functional operation beyond the recommended operating conditions is not implied. Stress beyond the absolute maximum ratings may cause permanent damage to the device. Exposure to absolute maximum rated conditions for extended periods may affect device reliability. PARAMETER
Input Supply Voltage Voltages on: ENABLE, VSENSE, VSO - VS2 Voltages on: VFB (EP5358LUI) Maximum Operating Junction Temperature Storage Temperature Range Reflow Temp, 10 Sec, MSL3 JEDEC J-STD-020C ESD Rating (based on Human Body Mode) TJ-ABS TSTG -65
SYMBOL
VIN
MIN
-0.3 -0.3 -0.3
MAX
6.0 VIN+ 0.3 2.7 150 150 260 2000
UNITS
V V V C C C V
Recommended Operating Conditions
PARAMETER
Input Voltage Range Operating Ambient Temperature Operating Junction Temperature
SYMBOL
VIN TA TJ
MIN
2.4 -40 -40
MAX
5.5 +85 +125
UNITS
V C C
Thermal Characteristics
PARAMETER
Thermal Resistance: Junction to Ambient -0 LFM (Note 1) Thermal Overload Trip Point Thermal Overload Trip Point Hysteresis
SYMBOL
JA TJ-TP
TYP
85 +155 25
UNITS
C/W C C
Note 1: Based on a four layer copper board and proper thermal design per JEDEC EIJ/JESD51 standards
(c)Enpirion 2009 all rights reserved, E&OE
03541
3
5/29/2009
www.enpirion.com
Rev:A
EP5358LUI/EP5358HUI
Electrical Characteristics
NOTE: TA = -40C to +85C unless otherwise noted. Typical values are at TA = 25C, VIN = 3.6V. CIN = 2.2F 0603 MLCC, COUT = 10F 0805 MLCC
PARAMETER
Operating Input Voltage Range Under Voltage Lock-out - VIN Rising Under Voltage Lock-out - VIN Falling Drop Out Resistance Output Voltage Range Dynamic Voltage Slew Rate VID Preset VOUT Initial Accuracy Line Regulation Load Regulation Temperature Variation Output Current Shut-down Current OCP Threshold Feedback Pin Voltage Initial Accuracy Feedback Pin Input Current VS0-VS2, Pin Logic Low VS0-VS2, Pin Logic High VS0-VS2, Pin Input Current Enable Pin Logic Low Enable Pin Logic High Enable Pin Current Operating Frequency Soft Start Operation Soft Start Slew Rate
SYMBOL
VIN VUVLO_R VUVLO_F RDO VOUT VSLEW VOUT VOUT_LINE VOUT_LOAD VOUT_TEMPL IOUT ISD ILIM VFB IFB VVSLO VVSHI IVSX VENLO VENHI IENABLE FOSC
TEST CONDITIONS
MIN
2.4
TYP
MAX
5.5
UNITS
V V V
2.0 1.9 Input to Output Resistance EP5358LUI (VDO = ILOAD X RDO) EP5358HUI EP5358LUI EP5358HUI TA = 25C, VIN = 3.6V; ILOAD = 100mA ; 0.8V VOUT 3.3V 2.4V VIN 5.5V 0A ILOAD 600mA -40C TA +85C 500 Enable = Low 2.4V VIN 5.5V 0.6V VOUT 3.3V TA = 25C, VIN = 3.6V; ILOAD = 100mA ; 0.8V VOUT 3.3V Note 1 0.0 1.4 Note 1 <100 0.3 1.4 Note 1 <100 5 EP5358HUI EP5358LUI 8 4 1.25 -2 0.03 0.48 24 600 0.75 1.4 0.6 1.8 4 8 +2 350 500
VIN-VDO
m V V/mS % %/V %/A ppm/C mA A A
3.3
.588
0.6 <100
0.612
V nA
0.3 VIN
V V nA V V nA MHz
VSS
V/mS
Note 1: Parameter guaranteed by design
(c)Enpirion 2009 all rights reserved, E&OE
03541
4
5/29/2009
www.enpirion.com
Rev:A
EP5358LUI/EP5358HUI
Typical Performance Characteristics
95 90 85 80 75 70 65 60 55 50 45 0 200 400 Load Current (mA) 600
95 90 85 80 75 70 65 60 55 50 45 0 200 400 Load Current (mA) 600
Efficiency (%)
Efficiency vs. Load Current: VIN = 5.0V, VOUT (from top to bottom) = 3.3, 2.5, 1.8, 1.2V
95 90 85 80 75 70 65 60 55 50 45 0 200 400 Load Current (mA) 600
Efficiency (%)
Efficiency vs. Load Current: VIN = 3.3V, VOUT (from top to bottom) = 2.5, 1.8, 1.2V
Efficiency (%)
Efficiency vs. Load Current: VIN = 3.7V, VOUT (from top to bottom) = 2.5, 1.8, 1.2V
Start Up Waveform: VIN = 5.0V, VOUT = 3.3V; ILOAD = 10mA (c)Enpirion 2009 all rights reserved, E&OE
03541
Start Up Waveform: VIN = 5.0V, VOUT = 3.3V; ILOAD = 1000mA 5
5/29/2009
www.enpirion.com
Rev:A
EP5358LUI/EP5358HUI
Shut-down Waveform: VIN = 5.0V, VOUT = 3.3V; ILOAD = 10mA
Shut-down Waveform: VIN = 5.0V, VOUT = 3.3V; ILOAD = 500mA
Output Ripple: VIN = 5.0V, VOUT = 1.2V, Load = 500mA
Output Ripple: VIN = 5.0V, VOUT = 3.3V Load = 500mA
Output Ripple: VIN = 3.3V, VOUT = 1.8V Load = 500mA (c)Enpirion 2009 all rights reserved, E&OE
03541
Output Ripple: VIN = 3.3V, VOUT = 1.2V, Load = 500mA 6
5/29/2009
www.enpirion.com
Rev:A
EP5358LUI/EP5358HUI
Load Transient: VIN = 5.0V, VOUT = 1.2V Load stepped from 10mA to 500mA
Load Transient: VIN = 3.3V, VOUT = 1.8V Load stepped from 10mA to 500mA
(c)Enpirion 2009 all rights reserved, E&OE
03541
7
5/29/2009
www.enpirion.com
Rev:A
EP5358LUI/EP5358HUI
Functional Block Diagram
PVIN
UVLO Thermal Limit Current Limit
EP5358UI
ENABLE
Soft Start P-Drive (-) PWM Comp (+)
NC(SW)
Logic
N-Drive
VOUT
GND Sawtooth Generator Compensation Network VSENSE
(-) Error Amp (+)
Switch VFB
DAC VREF Voltage Select Package Boundry AVIN AGND VS0 VS1 VS2
Figure 5: Functional Block Diagram
(c)Enpirion 2009 all rights reserved, E&OE
03541
8
5/29/2009
www.enpirion.com
Rev:A
EP5358LUI/EP5358HUI
Detailed Description
Functional Overview
The EP5358xUI requires only 2 small MLCC capacitors for a complete DC-DC converter solution. The device integrates MOSFET switches, PWM controller, Gate-drive, compensation, and inductor into a tiny 3mm x 3mm x 1.1mm micro-QFN package. Advanced package design, along with the high level of integration, provides very low output ripple and noise. The EP5358xUI uses voltage mode control for high noise immunity and load matching to advanced 90nm loads. A 3-pin VID allows the user to choose from one of 8 output voltage settings. The EP5358xUI comes with two VID output voltage ranges. The EP5358HUI provides VOUT settings from 1.8V to 3.3V, the EP5358LUI provides VID settings from 0.8V to 1.5V, and also has an external resistor divider option to program output setting over the 0.6V to VIN-0.25V range. The EP5358xUI provides the industry's highest power density of any 500mA DCDC converter solution. The key enabler of this revolutionary integration is Enpirion's proprietary power MOSFET technology. The advanced MOSFET switches are implemented in deep-submicron CMOS to supply very low switching loss at high switching frequencies and to allow a high level of integration. The semiconductor process allows seem-less integration of all switching, control, and compensation circuitry. The proprietary magnetics design provides high-density/high-value magnetics in a very small footprint. Enpirion magnetics are carefully matched to the control and compensation circuitry yielding an optimal solution with assured performance over the entire operating range. Protection features include under-voltage lockout (UVLO), over-current protection (OCP), short circuit protection, and thermal overload protection.
Integrated Inductor: Low-Noise Low-EMI
The EP5358xUI utilizes a proprietary low loss integrated inductor. The integration of the inductor greatly simplifies the power supply design process. The inherent shielding and compact construction of the integrated inductor reduces the conducted and radiated noise that can couple into the traces of the printed circuit board. Further, the package layout is optimized to reduce the electrical path length for the high di/dT input AC ripple currents that are a major source of radiated emissions from DC-DC converters. The integrated inductor provides the optimal solution to the complexity, output ripple, and noise that plague low power DCDC converter design.
Control Matched to sub 90nm Loads
The EP5358xUI utilizes an integrated type III compensation network. Voltage mode control is inherently impedance matched to the sub 90nm process technology that is used in today's advanced ICs. Voltage mode control also provides a high degree of noise immunity at light load currents so that low ripple and high accuracy are maintained over the entire load range. The very high switching frequency allows for a very wide control loop bandwidth and hence excellent transient performance.
Soft Start
Internal soft start circuits limit in-rush current when the device starts up from a power down condition or when the "ENABLE" pin is asserted "high". Digital control circuitry limits the VOUT ramp rate to levels that are safe for the Power MOSFETS and the integrated inductor. The EP5358HUI has a soft-start slew rate that is twice that of the EP5358LUI. Excess bulk capacitance on the output of the device can cause an over-current condition at startup. The maximum total capacitance on the output, including the output filter capacitor and bulk and decoupling capacitance, at the load, is given as: EP5358LUI:
9
5/29/2009
(c)Enpirion 2009 all rights reserved, E&OE
03541
www.enpirion.com
Rev:A
EP5358LUI/EP5358HUI COUT_TOTAL_MAX = COUT_Filter + COUT_BULK = 200uF EP5358HUI: COUT_TOTAL_MAX = COUT_Filter + COUT_BULK = 100uF The nominal value for COUT is 10uF. See the applications section for more details.
Enable
The ENABLE pin provides a means to shut down the converter or enable normal operation. A logic low will disable the converter and cause it to shut down. A logic high will enable the converter into normal operation. NOTE: The ENABLE pin must not be left floating.
Over Current/Short Circuit Protection
The current limit function is achieved by sensing the current flowing through a sense PMOSFET which is compared to a reference current. When this level is exceeded the PFET is turned off and the N-FET is turned on, pulling VOUT low. This condition is maintained for approximately 0.5mS and then a normal soft start is initiated. If the over current condition still persists, this cycle will repeat.
Thermal Shutdown
When excessive power is dissipated in the chip, the junction temperature rises. Once the junction temperature exceeds the thermal shutdown temperature the thermal shutdown circuit turns off the converter output voltage thus allowing the device to cool. When the junction temperature decreases by 15C, the device will go through the normal startup process.
Under Voltage Lockout
During initial power up an under voltage lockout circuit will hold-off the switching circuitry until the input voltage reaches a sufficient level to insure proper operation. If the voltage drops below the UVLO threshold the lockout circuitry will again disable the switching. Hysteresis is included to prevent chattering between states.
(c)Enpirion 2009 all rights reserved, E&OE
03541
10
5/29/2009
www.enpirion.com
Rev:A
EP5358LUI/EP5358HUI
Application Information
PVIN
VIN
2.2F 0603
VOUT VSENSE
VOUT
AVIN ENABLE
VS0 VS1 VS2
input of the error amplifier. This allows the use of a single feedback divider with constant loop gain and optimum compensation, independent of the output voltage selected. NOTE: The VID pins must not be left floating.
10F 0603
PGND AGND
EP5358L Low VID Range Programming
The EP5358LUI is designed to provide a high degree of flexibility in powering applications that require low VOUT settings and dynamic voltage scaling (DVS). The device employs a 3-pin VID architecture that allows the user to choose one of seven (7) preset output voltage settings, or the user can select an external voltage divider option. The VID pin settings can be changed on the fly to implement glitchfree voltage scaling.
Table 1: EP5358LUI VID Voltage Select Settings
VS2 0 0 0 0 1 1 1 1 VS1 0 0 1 1 0 0 1 1 VS0 0 1 0 1 0 1 0 1 VOUT 1.50 1.45 1.20 1.15 1.10 1.05 0.8 EXT
Figure 6: Application Circuit, EP5358HUI,.
PVIN
VIN
2.2F 0603
VOUT VSENSE VFB
PGND AGND
VOUT
AVIN ENABLE
VS0 VS1 VS2
10F 0603
Figure 7: Application Circuit, EP5358LUI, showing the VFB function.
Output Voltage Programming
The EP5358xUI utilizes a 3-pin VID to program the output voltage value. The VID is available in two sets of output VID programming ranges. The VID pins should be connected either to AVIN or to AGND to avoid noise coupling into the device. The "Low" range is optimized for low voltage applications. It comes with preset VID settings ranging from 0.80V and 1.5V. This VID set also has an external divider option. To specify this VID range, order part number EP5358LUI. The "High" VID set provides output voltage settings ranging from 1.8V to 3.3V. This version does not have an external divider option. To specify this VID range, order part number EP5358HUI. Internally, the output of the VID multiplexer sets the value for the voltage reference DAC, which in turn is connected to the non-inverting
(c)Enpirion 2009 all rights reserved, E&OE
03541
Table 1 shows the VS2-VS0 pin logic states for the EP5358LUI and the associated output voltage levels. A logic "1" indicates a connection to AVIN or to a "high" logic voltage level. A logic "0" indicates a connection to AGND or to a "low" logic voltage level. These pins can be either hardwired to AVIN or AGND or alternatively can be driven by standard logic levels. Logic levels are defined in the electrical characteristics table. Any level between the logic high and logic low is indeterminate.
EP5358LUI External Voltage Divider
The external divider option is chosen by connecting VID pins VS2-VS0 to VIN or a logic "1" or "high". The EP5358LUI uses a separate feedback pin, VFB, when using the external divider. VSENSE must be connected to VOUT as indicated in Figure 8. The output voltage is selected by the following formula:
11
5/29/2009
www.enpirion.com
Rev:A
EP5358LUI/EP5358HUI VOUT = 0.6V (1 +
VIN
2.2uF 0603
PVIN AVIN ENABLE
Ra Rb
)
VOUT
Ra 10F 0603
Table 2: EP5358HUI VID Voltage Select Settings
VS2 0 0 0 0 1 1 1 1 VS1 0 0 1 1 0 0 1 1 VS0 0 1 0 1 0 1 0 1 VOUT 3.3 3.0 2.9 2.6 2.5 2.2 2.1 1.8
VSense VOUT
EP5358L
VS0 VS1 VS2
VFB Rb
PGND AGND
Input Filter Capacitor
Figure 8: EP5358LUI using external divider
Ra must be chosen as 237K to maintain loop gain. Then Rb is given as:
Rb =
142.2 x10 3 VOUT - 0.6
VOUT can be programmed over the range of 0.6V to (VIN - 0.25V). NOTE: Dynamic Voltage Scaling is not allowed between internal preset voltages and external divider.
The input filter capacitor requirement is a 2.2F 0603 low ESR MLCC capacitor. The input capacitor must use a X5R or X7R or equivalent dielectric formulation. Y5V or equivalent dielectric formulations lose capacitance with frequency, bias, and with temperature, and are not suitable for switchmode DC-DC converter input filter applications.
Output Filter Capacitor
The output filter capacitor requirement is a minimum of 10F 0603 MLCC for VIN<4.3V and 10uF 0805 for VIN>4.3V. Ripple performance can be improved by using 2x10F 0603 MLCC capacitors (for any allowed VIN). The maximum output filter capacitance next to the output pins of the device is 60F low ESR MLCC capacitance. VOUT has to be sensed at the last output filter capacitor next to the EP5358xUI. Additional bulk capacitance for decoupling and bypass can be placed at the load as long as there is sufficient separation between the VOUT Sense point and the bulk capacitance. Excess total capacitance on the output (Output Filter + Bulk) can cause an over-current condition at startup. Refer to the section on Soft-Start for the maximum total capacitance on the output. The output capacitor must use a X5R or X7R or equivalent dielectric formulation. Y5V or equivalent dielectric formulations lose capacitance with frequency, bias, and temperature and are not suitable for switchmode DC-DC converter output filter applications. www.enpirion.com
Rev:A
EP5358HUI High VID Range Programming
The EP5358HUI VOUT settings are optimized for higher nominal voltages such as those required to power IO, RF, or IC memory. The preset voltages range from 1.8V to 3.3V. There are eight (8) preset output voltage settings. The EP5358HUI does not have an external divider option. As with the EP5358LUI, the VID pin settings can be changed while the device is enabled. Table 2 shows the VS0-VS2 pin logic states for the EP5358HUI and the associated output voltage levels. A logic "1" indicates a connection to AVIN or to a "high" logic voltage level. A logic "0" indicates a connection to AGND or to a "low" logic voltage level. These pins can be either hardwired to AVIN or AGND or alternatively can be driven by standard logic levels. Logic levels are defined in the electrical characteristics table. Any level between the logic high and logic low is indeterminate. These pins must not be left floating.
(c)Enpirion 2009 all rights reserved, E&OE
03541
12
5/29/2009
EP5358LUI/EP5358HUI
Recommended PCB Footprint
Figure 9: EP5358 Package PCB Footprint
(c)Enpirion 2009 all rights reserved, E&OE
03541
13
5/29/2009
www.enpirion.com
Rev:A
EP5358LUI/EP5358HUI
Package and Mechanical
Figure 10: EN5358xQI Package Dimensions
Contact Information
Enpirion, Inc. Perryville III 53 Frontage Road Suite 210 Hampton, NJ 08827 Phone: +1 908-894-6000 Fax: +1 908-894-6090
Enpirion reserves the right to make changes in circuit design and/or specifications at any time without notice. Information furnished by Enpirion is believed to be accurate and reliable. Enpirion assumes no responsibility for its use or for infringement of patents or other third party rights, which may result from its use. Enpirion products are not authorized for use in nuclear control systems, as critical components in life support systems or equipment used in hazardous environment without the express written authority from Enpirion.
(c)Enpirion 2009 all rights reserved, E&OE
03541
14
5/29/2009
www.enpirion.com
Rev:A

▲Up To Search▲

Price & Availability of EP5358HUI

	To Download EP5358HUI Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .