sc2604 Semtech Corporation, sc2604 Datasheet
sc2604
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sc2604 Summary of contents
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... Hiccup mode over-current protection allows system auto- retry and ease of trouble shooting. Internally compensated feedback loop makes power supply design simple, and eliminates the need for external compensation network. The SC2604 is available in MSOP-8 package with rated temperature range of - +85 o SC2604 C ...
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... Semtech Lot No. (Example: E90) xxxx = Semtech Lot No. (Example: 0-) © 2007 Semtech Corp. Ordering Information Device SC2604MSTRT ()(2) SC2604EVB Evaluation Board Notes: () Available in tape and reel only. A reel contains 2,500 devices. (2) Available in lead-free package only. Device is fully WEEE and RoHS compliant. SC2604 Package MSOP-8 www.semtech.com 2 ...
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... SS/VREF I = 0. 3.5V 0. SC2604 ……………………………… 60°C/W () ………………………………… 45°C/W () Min Typ Max Units 4.5 3.5 4.2 4 ...
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... Pull down below this level to disable PWM Switch gate Pull above this level to enable PWM Switch gate V = 2V 5.5V IN DRV V = 2V DRV Pull down below this level to disable Disconnect FET gate SC2604 Min Typ Max Units 0.5 0.8 A 0.5 0 µA µA 45 µ ...
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... Pulling this pin low can disable the linear and the switcher to turn off the circuit. 8 DRV Gate drive of input disconnect FET limiting system input current © 2007 Semtech Corp. SC2604 www.semtech.com 5 ...
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... Block Diagram © 2007 Semtech Corp. Figure 2. SC2604 Function Diagram SC2604 www.semtech.com 6 ...
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... Typical Characteristics © 2007 Semtech Corp. SC2604 www.semtech.com 7 ...
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... Typical Characteristics (Cont.) © 2007 Semtech Corp. SC2604 www.semtech.com 8 ...
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... The SC2604 is a voltage-mode PWM controller with a fixed switching frequency of 400kHz for use in high efficiency, boosted voltage, DC/DC power supplies. As shown in Figure 2, the PWM control loop of the SC2604 consists of a 400kHz oscillator, a PWM comparator, a voltage error amplifier, and a FET driver. The boost ...
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... Applications Information (Cont.) soft-start of the switching boost regulator. The DRV pin of the SC2604 is meant to drive an N-Channel FET that can disconnect the input supply in the event of an over-current condition. The OCP/EN capacitor becomes part of a hiccup oscillator that is charged with 37µA and discharged with µ ...
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... Note: Heavy lines indicate the critical loop carrying high pulsating current. The inductance of the loop needs to be minimized. © 2007 Semtech Corp. 5) The SC2604 is best placed over an isolated ground plane area. The soft-start capacitor and the Vin decoupling capacitor should also connected to this ground pad area ...
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... Applications Information (Cont.) Typical application schematic with 12V input and 25V/1.5A output Note: A small Schottky diode (Da) may be required in some applications to clamp negative spike at the GATE pin. Bill of materials © 2007 Semtech Corp. SC2604 www.semtech.com 2 ...
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... Applications Information (Cont.) © 2007 Semtech Corp. Start up Inductor current and DRV pin voltage at OCP SC2604 www.semtech.com 3 ...
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... Outline Drawing - MSOP-8 Land Pattern - MSOP-8 Contact Information © 2007 Semtech Corp. Semtech Corporation Power Mangement Products Division 200 Flynn Road, Camarillo, CA 9302 Phone: (805) 498-2 Fax: (805) 498-3804 SC2604 www.semtech.com 4 ...