LTC1522 Linear Technology, LTC1522 Datasheet
LTC1522
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LTC1522 Summary of contents
Page 1
... A. The LTC1522 has thermal shutdown and can survive a continuous short from V load is disconnected from V 8-pin MSOP and SO packages. The LTC1522 is pin compatible with the LTC1516 in applications where V 2 ...
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... Note 2: C grade device specifications are guaranteed over the temperature range. In addition, C grade device specifications are assured over the – temperature range by design or correlation, but are not production tested. ORDER PART TOP VIEW NUMBER 8 NC LTC1522CS8 7 SHDN 6 GND – PART MARKING ...
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... C (Pin 5): Flying Capacitor, Negative Terminal. with a GND (Pin 6): Ground. IN SHDN (Pin 7): Active High CMOS Logic-Level Shutdown = 0V in Shutdown). Input. Drive SHDN low to enable the DC/DC converter. Do not float. NC (Pin 8): No Connect. LTC1522 Output Ripple vs Input Voltage 250 I = 10mA OUT C = 0.1 F FLY ...
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... C, and reenables the charge pump once the junction temperature falls back to 145 C. and The LTC1522 will cycle in and out of thermal shutdown IN indefinitely without latchup or damage until the V short is removed. Capacitor Selection ...
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... Output Ripple Normal LTC1522 operation produces voltage ripple on the V pin. Output voltage ripple is required for the LTC1522 OUT to regulate. Low frequency ripple exists due to the hyster- esis in the sense comparator and propagation delays in the charge pump enable/disable circuits. High frequency ripple is also present mainly due to ESR (Equivalent Series Resistance) in the output capacitor ...
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... F03a Figure 3b. Maximum SHDN OFF Time vs Output Load Current for Ultralow I Each time the LTC1522 comes out of shutdown, the part delivers a minimum of one clock cycle worth of charge to the output. Under high V conditions, this behavior may cause a net excess of charge to be delivered to the output capacitor if a high frequency signal is used on the SHDN pin (e ...
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... U U APPLICATIONS INFORMATION General Layout Considerations Due to the high switching frequency and high transient currents produced by the LTC1522, careful board layout is a must. A clean board layout using a ground plane and PACKAGE DESCRIPTION 0.007 (0.18) 0.021 0.006 (0.53 0.015) * DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.006" ...
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... LEVEL SHIFT COMMENTS Includes Micropower Shutdown ( 30mA at Regulated Output 10V 20mA (V OUT LTC1522 Without Shutdown and Packaged in SOT-23 Step-Up/Step-Down SIM Power Supply and Level Translators 5V to – 5V Conversion with Low Voltage Loss TRUTH TABLE ...