LP38856-1.2EVAL National Semiconductor, LP38856-1.2EVAL Datasheet
LP38856-1.2EVAL
Specifications of LP38856-1.2EVAL
Related parts for LP38856-1.2EVAL
LP38856-1.2EVAL Summary of contents
Page 1
... The fast transient response of this device makes it suitable for use in powering DSP, Microcontroller Core voltages and Switch Mode Power Supply post regulators. The LP38856 is available in TO-220 and TO-263 5-Lead packages. Dropout Voltage: 240 mV (typical load current. ...
Page 2
... Ordering Information V * Order Number OUT LP38856S-0.8 0.8V LP38856SX-0.8 LP38856T-0.8 LP38856S-1.2 1.2V LP38856SX-1.2 LP38856T-1.2 * For custom V values between 0.8V and 1.2V please contact the National Semiconductor Sales Office. OUT Connection Diagrams TO-263, Top View Pin Descriptions Pin # Pin Symbol GND 4 OUT 5 BIAS ...
Page 3
... V V OUT(NOM) IN BIAS ≤ ≤ 3.0V V 5.5V BIAS ≤ ≤ 3.0A OUT I = 3.0A OUT LP38856-0.8 ≤ ≤ 3.0A OUT LP38856-1.2 ≤ ≤ 3.0A OUT ≤ V 0.5V EN ≤ ≤ 3.0A OUT ≤ rising until device is BIAS functional V falling from UVLO threshold ...
Page 4
Symbol Parameter ENABLE Pin I ENABLE pin Current EN V Enable Voltage Threshold EN(ON) V Enable Voltage Hysteresis EN(HYS) t Turn-OFF Delay Time OFF t Turn-ON Delay Time ON AC Parameters PSRR Ripple Rejection for Voltage ...
Page 5
Typical Performance Characteristics V = 3.0V mA BIAS OUT IN OUT V Ground Pin Current (I BIAS GND(BIAS) V Ground Pin Current (I IN GND(IN) Dropout Voltage ( Temperature DO Unless otherwise ...
Page 6
V vs Temperature OUT Enable Thresholds (V EN Enable Pull-Up Resistor (r www.national.com 20131167 ) vs Temperature Enable Pull-Down Current (I 20131172 ) vs Temperature EN 20131174 6 UVLO Thresholds vs Temperature 20131168 ) vs Temperature EN 20131173 V Line ...
Page 7
V Line Transient Response IN V Line Transient Response BIAS = 10 μF Ceramic Load Transient Respose, C OUT V Line Transient Response BIAS 20131178 Load Transient Response, C 20131180 Load Transient Response, C 20131182 7 20131179 = 10 μF ...
Page 8
Load Transient Response, C Load Transient Response PSRR IN www.national.com = 100 μF Ceramic Load Transient Response, C OUT 20131184 = 100 μF Tantalum OUT 20131186 20131171 8 = 100 μF Tantalum OUT 20131185 V PSRR BIAS 20131170 ...
Page 9
Block Diagram 9 20131105 www.national.com ...
Page 10
Application Information EXTERNAL CAPACITORS To assure regulator stability, capacitors are required on the input, output and bias pins as shown in the Typical Application Circuit. Output Capacitor A minimum output capacitance of 10 µF, ceramic, is required for stability. The ...
Page 11
... The maximum allowable value for junction to ambient Ther- mal Resistance, θ , can be calculated using the formula: JA The LP38856 is available in TO-220 and TO-263 packages. The thermal resistance in the application depends on amount of copper area or heat-sink, and on air flow. If the maximum allowable value of θ ...
Page 12
Physical Dimensions TO220 5-lead, Molded, Stagger Bend Package (TO220-5) TO263 5-Lead, Molded, Surface Mount Package (TO263-5) www.national.com inches (millimeters) unless otherwise noted NS Package Number T05D NS Package Number TS5B 12 ...
Page 13
Notes 13 www.national.com ...
Page 14
... National Semiconductor and the National Semiconductor logo are registered trademarks of National Semiconductor Corporation. All other brand or product names may be trademarks or registered trademarks of their respective holders. ...