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EL7516
Data Sheet May 4, 2004 FN7333.1
PRELIMINARY
600kHz/1.2MHz PWM Step-Up Regulator
The EL7516 is a high frequency, high efficiency step-up voltage regulator operated at constant frequency PWM mode. With an internal 1.5A, 200m MOSFET, it can deliver up to 600mA output current at over 90% efficiency. The selectable 600kHz and 1.2MHz allows smaller inductors and faster transient response. An external compensation pin gives the user greater flexibility in setting frequency compensation allowing the use of low ESR Ceramic output capacitors. When shut down, it draws < 10A of current and can operate down to 2.5V input supply. These features along with 1.2MHz switching frequency makes it an ideal device for portable equipment and TFT-LCD displays. The EL7516 is available in an 8-pin MSOP package with a maximum height of 1.1mm. The device is specified for operation over the full -40C to +85C temperature range.
Features
* > 90% efficiency * 1.6A, 200m power MOSFET * VIN > 2.5V * 600kHz/1.2MHz switching frequency selection * Adjustable soft-start * Internal thermal protection * 1.1mm max height 8-pin MSOP package * Pb-free Available
Applications
* TFT-LCD displays * DSL modems * PCMCIA cards * Digital cameras * GSM/CDMA phones
Pinout
EL7516 (8-PIN MSOP) TOP VIEW
COMP 1 FB 2 SHDN 3 GND 4 8 SS 7 FSEL 6 VDD 5 LX
* Portable equipment * Hand-held devices
Ordering Information
PART NUMBER EL7516IYZ (See Note) EL7516IYZ-T7 (See Note) EL7516IYZ-T13 (See Note) PACKAGE 8-Pin MSOP (Pb-free) 8-Pin MSOP (Pb-free) 8-Pin MSOP (Pb-free) TAPE & REEL 7" 13" PKG. DWG. # MDP0043 MDP0043 MDP0043
NOTE: Intersil Pb-free products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which is compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J Std-020B.
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CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright (c) Intersil Americas Inc. 2004. All Rights Reserved. Elantec is a registered trademark of Elantec Semiconductor, Inc. All other trademarks mentioned are the property of their respective owners.
EL7516
Absolute Maximum Ratings (TA = 25C)
LX to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18V VDD to GND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6V COMP, FB, SHDN, SS, FSEL to GND . . . . . . -0.3V to (VDD +0.3V) Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . .-65C to +150C Operating Ambient Temperature . . . . . . . . . . . . . . . .-40C to +85C Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . . +135C
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typical values are for information purposes only. Unless otherwise noted, all tests are at the specified temperature and are pulsed tests, therefore: TJ = TC = TA
Electrical Specifications
PARAMETER IQ1 IQ2 IQ3 VFB IB-FB VDD DMAX-600kHz DMAX-1.2MHz ILIM ISHDN RDS-ON ILX-LEAK VOUT/VIN VOUT/IOUT FOSC1 FOSC2 VIL VIH GM AV VDD-ON VDD-OFF ISS RCS
VIN = 3.3V, VOUT = 12V, IOUT = 0mA, FSEL = GND, TA = 25C unless otherwise specified. CONDITIONS SHDN = 0V SHDN = VDD, FB = 1.3V SHDN = VDD, FB = 1.0V 1.272 MIN TYP 0.6 0.7 1.3 1.294 0.01 2.6 FSEL = 0V FSEL = VDD 84 84 1.3 SHDN = 0V VDD = 2.7V, ILX = 1A VSW = 18V 3V < VIN < 5.5V, VOUT = 12V VIN = 3.3V, VOUT = 12V, IO = 30mA to 200mA FSEL = 0V FSEL = VDD 500 1000 90 90 1.5 0.01 0.2 0.01 0.1 6.7 620 1250 740 1500 0.5 2.7 I = 5A 90 130 350 2.40 2.20 4 2.51 2.30 6 0.08 2.60 2.40 8 170 3 0.1 2 1.309 0.5 5.5 MAX 10 UNIT A mA mA V A V % % A A A % mV/A kHz kHz V V 1/ V/V V V A V/A
DESCRIPTION Quiescent Current - Shut-down Quiescent Current - Not Switching Quiescent Current - Switching Feedback Voltage Feedback Input Bias Current Start-Up Input Voltage Range Maximum Duty Cycle Maximum Duty Cycle Current Limit - Max Peak Input Current Shut-down Input Bias Current Switch ON Resistance Switch Leakage Current Line Regulation Load Regulation Switching Frequency Accuracy Switching Frequency Accuracy SHDN, FSEL Input Low Level SHDN, FSEL Input High Level Error Amp Tranconductance Voltage Gain VDD UVLO On Threshold VDD UVLO Off Threshold Soft-start Charge Current Current Sense Transresistance
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EL7516 Block Diagram
FSEL SHDN SS
VDD
REFERENCE GENERATOR
OSCILLATOR
SHUTDOWN & START-UP CONTROL
LX PWM LOGIC CONTROLLER COMPARATOR FET DRIVER
CURRENT SENSE
GND
FB GM AMPLIFIER
COMP
Pin Descriptions
PIN NUMBER 1 2 3 4 5 6 7 8 PIN NAME COMP FB SHDN GND LX VDD FSEL SS DESCRIPTION Compensation pin. Output of the internal error amplifier. Capacitor and resistor from COMP pin to ground. Voltage feedback pin. Internal reference is 1.263V nominal. Connect a resistor divider from VOUT. VOUT = 1.26V (1 + R1 / R2). See Typical Application Circuit. Shutdown control pin. Pull SHDN low to turn off the device. Analog and power ground. Power switch pin. Connected to the drain of the internal power MOSFET. Analog power supply input pin. Frequency select pin. When FSEL is set low, switching frequency is set to 600kHz. When connected to high or VDD, switching frequency is set to 1.2MHz. Soft-start control pin. Connect a capacitor to control the converter start-up.
Typical Application Circuit
R3 3.9k C5 4.7nF 1 COMP R1 85.2k R2 10k 2 FB 3 SHDN 4 GND SS 8 FSEL 7 VDD 6 LX 5 C3 27nF C2 + C1 22F 10H + C2 22F 12V 2.7V TO 5.5V
0.1F
D1
3
EL7516 Typical Performance Curves
95 LOAD REGULATION (%) 0 100 200 IOUT (mA) 300 400
0.6 0.4
EFFICIENCY (%)
90
0.2 0 -0.2 -0.4 -0.6 -0.8
85
80
75
-1
0
50
100
150
200
250
300
350
IOUT (mA)
FIGURE 1. EFFICIENCY - 3.3V VIN TO 12V VOUT @ 1.3MHz
FIGURE 2. LOAD REGULATION - 3.3V VIN TO 12V VOUT @ 1.3MHz
90 LOAD REGULATION (%) 0 100 200 IOUT (mA) 300 400
1
EFFICIENCY (%)
0.5
85
0
80
-0.5
75
-1
0
50
100
150
200
250
300
350
IOUT (mA)
FIGURE 3. EFFICIENCY - 3.3V VIN TO 12V VOUT @ 620kHz
FIGURE 4. LOAD REGULATION - 3.3V VIN TO 12V VOUT @ 620kHz
95 90 EFFICIENCY (%) 85 80 75 70 LOAD REGULATION (%) 0 100 200 300 400 500
1
0.5
0
-0.5
-1
0
100
200
300
400
500
IOUT (mA)
IOUT (mA)
FIGURE 5. EFFICIENCY - 3.3V VIN TO 9V VOUT @ 1.2MHz
FIGURE 6. LOAD REGULATION - 3.3V VIN TO 9V VOUT @ 1.2MHz
4
EL7516 Typical Performance Curves
(Continued)
90 LOAD REGULATION (%) 0 100 200 300 400 500
1 0.6 0.2 -0.2 -0.6 -1
EFFICIENCY (%)
85
80
75
0
100
200
300
400
500
IOUT (mA)
IOUT (mA)
FIGURE 7. EFFICIENCY - 3.3V VIN TO 9V VOUT @ 600kHz
FIGURE 8. LOAD REGULATION - 3.3V VIN TO 9V VOUT @ 600kHz
95 LOAD REGULATION (%) 0 100 200 300 IOUT (mA) 400 500 600
0.8 0.6
EFFICIENCY (%)
90
0.4 0.2 1 -0.2 -0.4 -0.6 -0.8
85
80
75
-1
0
100
200
300 IOUT (mA)
400
500
600
FIGURE 9. EFFICIENCY - 5V VIN TO 12V VOUT @ 1.2MHz
FIGURE 10. LOAD REGULATION - 5V VIN TO 12V VOUT @ 1.2MHz
92 LOAD REGULATION (%) 100 200 400
0.8 0.6
EFFICIENCY (%)
90
0.4 0.2 1 -0.2 -0.4 -0.6 -0.8
88
86
84
0
300 IOUT (mA)
500
600
-1
0
100
200
300 IOUT (mA)
400
500
600
FIGURE 11. EFFICIENCY - 5V VIN TO 12V VOUT @ 600kHz
FIGURE 12. LOAD REGULATION - 5V VIN TO 12V VOUT @ 600kHz
5
EL7516 Typical Performance Curves
(Continued)
95 LOAD REGULATION (%) 0 400 800 1K
0.6 0.4
EFFICIENCY (%)
90
0.2 0 -0.2 -0.4 -0.6 -0.8
85
80
75
200
600
-1
0
200
400
600
800
1K
IOUT (mA)
IOUT (mA)
FIGURE 13. EFFICIENCY - 5V VIN TO 9V VOUT @ 1.2MHz
FIGURE 14. LOAD REGULATION - 5V VIN TO 9V VOUT @ 1.2MHz
0.2
VOUT=12V IOUT=80mA LINE REGULATION (%) 1.2MHz
0.1
VOUT=8V IOUT=80mA 1.2MHz
LINE REGULATION (%)
0.1
0.05
0 600kHz -0.1
0 600kHz
-0.05
-0.2
2
3
4 VIN (V)
5
6
-0.1 2.5
3.5
4.5 VIN (V)
5.5
6.5
FIGURE 15. LINE REGULATION
FIGURE 16. LINE REGULATION
95 600kHz 90 EFFICIENCY (%) 85 1.2MHz 80 75 70 10 LOAD REGULATION (%)
0.5 1.2MHz 0.3 0.1 -0.1 -0.3 -0.5 600kHz
110
210
310 IOUT (mA)
410
510
610
0
100
200
300 IOUT (mA)
400
500
600
FIGURE 17. EFFICIENCY vs IOUT - 3.3V TO 8V
FIGURE 18. LOAD REGULATION - 3.3V TO 8V
6
EL7516 Typical Performance Curves
(Continued)
94 92 FREQUENCY (MHz) 90 EFFICIENCY (%) 88 86 84 82 80 78 76 0 200 400 600 IOUT (mA) 600kHz 800 1K 1.2K 1.2MHz
1.29 1.28 1.27 1.26 1.25 1.24 1.23 1.22 1.21 1.2 2.5 3 3.5 4 VIN (V) 4.5 5 5.5
FIGURE 19. EFFICIENCY vs IOUT
FIGURE 20. FREQUENCY (1.2MHz) vs VIN
670 660 FREQUENCY (kHz) 650 640 630 620 610 600 2.5 3 3.5 4 VIN (V) 4.5 5 5.5 EFFICIENCY (kHz)
93 91 89 87 85 83 81
0
200
400
600
800
1K
IOUT (mA)
FIGURE 21. FREQUENCY (600kHz) vs VIN
FIGURE 22. EFFICIENCY - 5V VIN TO 9V VOUT @ 600kHz
0.4 LOAD REGULATION (%) VIN = 3.3V VOUT = 12V IOUT = 50mA TO 300mA
0.2
0
200mV/DIV
-0.2
-0.4
0
200
400
600
800
1K
0.1ms/DIV
IOUT (mA)
FIGURE 23. LOAD REGULATION - 5V VIN TO 9V VOUT @ 600kHz
FIGURE 24. TRANSIENT REPONSE - 600kHz
7
EL7516 Typical Performance Curves
(Continued)
1 POWER DISSIPATION (W) VIN = 3.3V VOUT = 12V IOUT = 50mA TO 300mA 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0.1ms/DIV
JEDEC JESD51-7 HIGH EFFECTIVE THERMAL CONDUCTIVITY TEST BOARD
870mW
JA =
200mV/DIV
M SO 11 P8 5 C/ W
0
25
50
75 85
100
125
AMBIENT TEMPERATURE (C)
FIGURE 25. TRANSIENT RESPONSE - 1.2MHz
FIGURE 26. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE
0.6 POWER DISSIPATION (W) 0.5
JEDEC JESD51-3 LOW EFFECTIVE THERMAL CONDUCTIVITY TEST BOARD
486mW 0.4 0.3 0.2 0.1 0
JA =
M SO P8 20 6 C/ W
0
25
50
75 85
100
125
AMBIENT TEMPERATURE (C)
FIGURE 27. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation's quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com 8

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