EL7512 Intersil Corporation, EL7512 Datasheet
EL7512
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EL7512 Summary of contents
Page 1
... NiMH cells. The EL7512 is available in a 10-pin MSOP package, with maximum height of 1.1mm. With proper external components, the whole converter takes less than 0.25in PCB space. This device is specified for operation over the full -40° ...
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... Voltage feedback input; needs to connect to resistor divider to decide V 9 VDD Control circuit positive supply 10 LX Inductor drive pin; connected to the drain of internal N-channel power MOSFET 2 EL7512 = 25°C) Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C Operating Temperature . . . . . . . . . . . . . . . . . . . . . . .-40°C to +85°C Operating Junction Temperature 135° ...
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... Block Diagram MAX_DUTY RT Reference 100kΩ Generator VREF VRAMP EN LBO LBI - + 210mV 3 EL7512 80.6k 1kΩ 10kΩ 4.7nF 0.1µ Thermal Shut-down PWM Comparator Start-up Oscillator SGND V OUT 15µF 47µF 10µF LX PWM 0.3Ω Logic 12µ LOUT 7.2k 80mΩ SS PGND 20nF V IN ...
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... S DD 1400 1200 1000 800 600 400 200 Internal REF J 1.4 1.35 1.3 1.25 1.2 1.15 1.1 1.05 V =12V EL7512 Efficiency V IN 100 110 160 210 10 (mA) Efficiency V IN 100 R =51.1kΩ =71.5kΩ =100kΩ =200kΩ ...
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... F S Steady State Operation (inductor discontinuous conduction) V =5V, V =12V ∆ ∆ EL7512 (Continued 1400 1200 1000 800 600 400 200 Steady State Operation (inductor continuous conduction) V ∆ ∆V ...
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... Applications Information The EL7512 is a step-up regulator, operated at fixed frequency pulse-width-modulation (PWM) control. The input voltage is 2V-12V and output voltage is 5V-18V. The switching frequency (up to 1.2MHz) is decided by the resistor connected to RT pin. Start-Up After V reaches a threshold of about 2V, the start-up DD oscillator generates fixed duty-ratio of 0.5-0 frequency of several hundred kilohertz ...
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... Otherwise, R4 can 10Ω to 51Ω with C4 = 0.1µF. Thermal Performance The EL7512 uses a fused-lead package, which has a reduced θ of 100°C four-layer board and 115°C two-layer board. Maximizing copper around the ground pins will improve the thermal performance. ...
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... 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 EL7512 ...