MAX8513EEI+ Maxim Integrated Products, MAX8513EEI+ Datasheet
MAX8513EEI+
Specifications of MAX8513EEI+
Related parts for MAX8513EEI+
MAX8513EEI+ Summary of contents
Page 1
... Wireless Routers Set-Top Boxes Automotive Dashboard Electronics Pin Configurations appear at end of data sheet. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. ♦ Low-Cost DC-DC Controller with Two LDOs ♦ Wide Input Range: 4.5V to 28V ♦ ...
Page 2
Wide-Input, High-Frequency, Triple-Output Supplies with Voltage Monitor and Power-On Reset ABSOLUTE MAXIMUM RATINGS IN, DRV3P, SUP2 to GND.......................................-0.3V to +30V DRV2 to GND ..........................................-0. DRV3N to GND......................(V - 28V SUP3N FREQ, PFI, PFO, POR, SUP3N, SYNC/EN, ...
Page 3
Wide-Input, High-Frequency, Triple-Output Supplies with Voltage Monitor and Power-On Reset ELECTRICAL CHARACTERISTICS (continued 12V SUP2 PVL BST 15.0kΩ 0°C to +85°C, unless otherwise noted. Typical values are ...
Page 4
Wide-Input, High-Frequency, Triple-Output Supplies with Voltage Monitor and Power-On Reset ELECTRICAL CHARACTERISTICS (continued 12V SUP2 PVL BST 15.0kΩ 0°C to +85°C, unless otherwise noted. Typical values are ...
Page 5
Wide-Input, High-Frequency, Triple-Output Supplies with Voltage Monitor and Power-On Reset ELECTRICAL CHARACTERISTICS (continued 12V SUP2 PVL BST 15.0kΩ 0°C to +85°C, unless otherwise noted. Typical values are ...
Page 6
Wide-Input, High-Frequency, Triple-Output Supplies with Voltage Monitor and Power-On Reset ELECTRICAL CHARACTERISTICS (continued 12V SUP2 PVL BST 15.0kΩ -40°C to +125°C (Note 2), unless otherwise noted.) A ...
Page 7
Wide-Input, High-Frequency, Triple-Output Supplies with Voltage Monitor and Power-On Reset ELECTRICAL CHARACTERISTICS (continued 12V SUP2 PVL BST 15.0kΩ -40°C to +125°C (Note 2), unless otherwise noted.) A ...
Page 8
Wide-Input, High-Frequency, Triple-Output Supplies with Voltage Monitor and Power-On Reset ELECTRICAL CHARACTERISTICS (continued 12V SUP2 PVL BST 15.0kΩ -40°C to +125°C (Note 2), unless otherwise noted.) A ...
Page 9
Wide-Input, High-Frequency, Triple-Output Supplies with Voltage Monitor and Power-On Reset (Circuit of MAX8513 evaluation kit EFFICIENCY vs. INPUT VOLTAGE 100 3.3V OUT1 OUT1 ...
Page 10
Wide-Input, High-Frequency, Triple-Output Supplies with Voltage Monitor and Power-On Reset (Circuit of MAX8513 evaluation kit 12V OUTPUT1 LOAD-TRANSIENT RESPONSE I = 0.75A 25mA OUT2 OUT3 50mV/div 50mV/div 100mV/div 0A 40µs/div SWITCHING WAVEFORMS (ALL OUTPUTS ...
Page 11
Wide-Input, High-Frequency, Triple-Output Supplies with Voltage Monitor and Power-On Reset (Circuit of MAX8513 evaluation kit STAGGERED SEQUENCE (SEQ = GND 2ms/div OUTPUT1 SHORT CIRCUIT (ALL OUTPUTS AT FULL LOAD 20µs/div ______________________________________________________________________________________ Typical Operating ...
Page 12
Wide-Input, High-Frequency, Triple-Output Supplies with Voltage Monitor and Power-On Reset PIN MAX8513 MAX8514 NAME Power-Fail Input. Connect PFI to an external resistive-divider between IN, PFI, and GND. PFI 1 1 PFI senses V 20mV of hysteresis. PFO 2 2 Power-Fail ...
Page 13
Wide-Input, High-Frequency, Triple-Output Supplies with Voltage Monitor and Power-On Reset PIN MAX8513 MAX8514 NAME SEQ 18 18 SYNC/ N.C. 20 — SUP3N — 20 DRV3P 21 — DRV3N — POR 23 23 FB3P 24 ...
Page 14
Wide-Input, High-Frequency, Triple-Output Supplies with Voltage Monitor and Power-On Reset SS SYNC/EN VL BIAS GND FREQ SEQ PFI PFO N POR N REF MAX8513 Figure 1. MAX8513 Functional Diagram 14 ______________________________________________________________________________________ 1/7.5 5µA PWM COMP. 1V P-P ...
Page 15
Wide-Input, High-Frequency, Triple-Output Supplies with Voltage Monitor and Power-On Reset SS SYNC/EN VL BIAS GND FREQ SEQ PFI PFO N POR N REF MAX8514 Figure 2. MAX8514 Functional Diagram ______________________________________________________________________________________ 1/7.5 5µA PWM COMP. 1V P-P ERROR ...
Page 16
Wide-Input, High-Frequency, Triple-Output Supplies with Voltage Monitor and Power-On Reset Detailed Description The MAX8513/MAX8514 combine a step-down DC-DC converter and two LDOs, providing three output volt- ages for xDSL modem and set-top box applications. The switching frequency is set with ...
Page 17
Wide-Input, High-Frequency, Triple-Output Supplies with Voltage Monitor and Power-On Reset Internal 5V Linear Regulator All MAX8513/MAX8514 functions (except for the posi- tive output LDO with an NFET or NPN, and the negative LDO on the MAX8514) are powered from the ...
Page 18
Wide-Input, High-Frequency, Triple-Output Supplies with Voltage Monitor and Power-On Reset Thermal-Overload Protection Thermal-overload protection limits the total power dissi- pation in the MAX8513/MAX8514. When the junction temperature exceeds T = +170°C, a thermal sensor J shuts down the device, forcing ...
Page 19
Wide-Input, High-Frequency, Triple-Output Supplies with Voltage Monitor and Power-On Reset diode on the secondary side (Q2 and D2 in the Typical Applications Circuits). n and n 2 turns of the secondary winding and the primary wind- ing, respectively ...
Page 20
Wide-Input, High-Frequency, Triple-Output Supplies with Voltage Monitor and Power-On Reset The peak-to-peak output voltage ripple as a conse- quence of the ESR, ESL, and output capacitance is × RIPPLE ESR ( ) ...
Page 21
Wide-Input, High-Frequency, Triple-Output Supplies with Voltage Monitor and Power-On Reset × I × f × OUT 1 S where I is the average DH high driver output-cur- GATE rent capability determined by: 2 ...
Page 22
Wide-Input, High-Frequency, Triple-Output Supplies with Voltage Monitor and Power-On Reset To set the current limit and the current-limit foldback thresholds, first select the foldback current-limit ratio (P ). This ratio is the foldback current limit (I FB divided by the ...
Page 23
Wide-Input, High-Frequency, Triple-Output Supplies with Voltage Monitor and Power-On Reset When the output capacitance is comprised of parallel- ing n number of identical capacitors whose values are C with ESR then: EACH ESR_EACH × ...
Page 24
Wide-Input, High-Frequency, Triple-Output Supplies with Voltage Monitor and Power-On Reset This gain is also set by the ratio of R3/R1 where R1 is calculated in the OUT1 Voltage Setting section. Thus × ...
Page 25
Wide-Input, High-Frequency, Triple-Output Supplies with Voltage Monitor and Power-On Reset Use 6.8kΩ π × × π × Ω PMOD Use 4.7nF × ...
Page 26
Wide-Input, High-Frequency, Triple-Output Supplies with Voltage Monitor and Power-On Reset This gain between f and f is also set by the ratio R3/R1, where R1 is selected in the OUT1 Voltage Setting section. Therefore × ...
Page 27
Wide-Input, High-Frequency, Triple-Output Supplies with Voltage Monitor and Power-On Reset π × × × π × × ...
Page 28
Wide-Input, High-Frequency, Triple-Output Supplies with Voltage Monitor and Power-On Reset A third pole occurs due to the input capacitance of the NMOS transistor’s gate iss data sheet), and the compensation resistor (R NPN bipolar transistor is used ...
Page 29
Wide-Input, High-Frequency, Triple-Output Supplies with Voltage Monitor and Power-On Reset the package’s power dissipation could limit the useable maximum input-to-output voltage differential. The maximum power-dissipation capability of the tran- sistor’s package and mounting must allow the actual power dissipation in ...
Page 30
Wide-Input, High-Frequency, Triple-Output Supplies with Voltage Monitor and Power-On Reset POLE π × the second pole occurs well after unity-gain crossover, the linear regulator remains ...
Page 31
Wide-Input, High-Frequency, Triple-Output Supplies with Voltage Monitor and Power-On Reset V IN C10 2.2µ R10 68.1kΩ SUP2 PFI R11 12.4kΩ EN/SYNC C5 R3 4.7nF 6.8kΩ FB1 COMP1 C12 33pF R7 10.7kΩ FREQ IC1 MAX8513 REF C9 0.1µF GND ...
Page 32
Wide-Input, High-Frequency, Triple-Output Supplies with Voltage Monitor and Power-On Reset 16V R15 10Ω C10 2.2µ R10 68.1kΩ SUP2 PFI R11 12.4kΩ EN/SYNC C5 R3 4.7nF 6.8kΩ FB1 COMP1 C12 33pF R7 10.7kΩ FREQ IC1 ...
Page 33
Wide-Input, High-Frequency, Triple-Output Supplies with Voltage Monitor and Power-On Reset MAX8513 a) POSITIVE OUTPUT VOLTAGE MAX8514 b) NEGATIVE OUTPUT VOLTAGE Figure 7. Base-Drive Noise Reduction Applications Information PC Board Layout Guidelines Careful PC board layout is critical to achieve low ...
Page 34
Wide-Input, High-Frequency, Triple-Output Supplies with Voltage Monitor and Power-On Reset TOP VIEW PFI 1 PFO BST 5 MAX8513 DL 6 PVL 7 PGND COMP1 10 FB1 11 FREQ 12 REF 13 GND ...
Page 35
... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 35 © 2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products ...