rt8059 Richtek Technology Corporation, rt8059 Datasheet
rt8059
Available stocks
Related parts for rt8059
rt8059 Summary of contents
Page 1
... The RT8059 is a high efficiency Pulse Width Modulated (PWM) step-down DC/DC converter, capable of delivering 1A output current over a wide input voltage range from 2.8V to 5.5V. The RT8059 is ideally suited for portable electronic devices that are powered by 1-cell Li-ion battery or by other power sources within the range, such as cellular phones, PDAs and handy-terminals ...
Page 2
... Function Block Diagram Slope Compensation Error FB Amplifier RC COMP www.richtek.com VIN 4.7µF RT8059 GND 2 −6 −6 and 6x10 Chip Enable (Active High). Do not leave the EN pin floating. Ground. Switch Node. Power Input. Feedback Input Pin. EN OSC & Current ...
Page 3
... OUT 200mA DS(ON)_P OUT 200mA DS(ON)_N OUT 2.8V to 5.5V LM_P 2. 2. UVLO UVLO 100mA OSC OUT MAX RT8059 2kV − Min Typ = REF -- 0.1 0.588 0 REF −3 -- − 0.28 -- 0.25 -- 1.5 1 2.3 -- 0.2 1.2 1.5 -- 150 100 -- www.richtek.com + 0.6V IN 40° ...
Page 4
... RT8059 Note 1. Stresses listed as the above “Absolute Maximum Ratings” may cause permanent damage to the device. These are for stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may remain possibility to affect device reliability. Note 2. θ ...
Page 5
... Input Voltage (V) Output Voltage vs. Output Current 1.230 V = 3.3V IN 1.225 1.220 1.215 1.210 1.205 1.200 1.195 1.190 1.185 1.180 0 0.1 0.2 0.3 0.4 0.5 Output Current (A) Current Limit vs. Temperature 2 3.3V 1.2V IN OUT 1.9 1.7 1.5 1.3 1.1 0.9 0.7 0.5 -50 - Temperature (°C) RT8059 4.5 5 5.5 0.6 0.7 0.8 0 100 125 www.richtek.com 5 ...
Page 6
... RT8059 Load Transient Response V = 3.3V 1.2V, IN OUT OUT V OUT (50mV/Div) I OUT (500mA/Div) Time (100μs/Div) Switching V = 3.3V 1.2V, IN OUT OUT V OUT (5mV/Div (2V/Div) I OUT (1A/Div) Time (250ns/Div) Power On from 3.3V 1.2V, OUT OUT EN (2V/Div) V OUT (500mV/Div) I OUT (1A/Div) Time (500μ ...
Page 7
... Applications Information The basic RT8059 application circuit is shown in Typical Application Circuit. External component selection is determined by the maximum load current and begins with the selection of the inductor value and operating frequency followed by C and OUT Inductor Selection For a given input and output voltage, the inductor value and operating frequency determine the ripple current. The ripple current Δ ...
Page 8
... P D(MAX) where T the ambient temperature, and θ thermal resistance. For recommended operating condition specifications of the RT8059, the maximum junction temperature is and T thermal resistance, θ 23-5 packages, the thermal resistance, θ V OUT on a standard JEDEC 51-3 single-layer thermal test board. The maximum power dissipation at T ...
Page 9
... The maximum power dissipation depends on the operating ambient temperature for fixed T resistance, θ . For the RT8059 package, the derating JA curves in Figure 2 allow the designer to see the effect of rising ambient temperature on the maximum power dissipation. 0.42 0.39 0.36 0.33 0.30 0.27 0.24 0.21 0.18 0.15 0.12 0.09 0.06 0.03 0. Ambient Temperature (°C) Figure 2. Derating Curves for RT8059 Package ...
Page 10
... RT8059 Outline Dimension Symbol Richtek Technology Corporation Headquarter 5F, No. 20, Taiyuen Street, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5526789 Fax: (8863)5526611 Information that is provided by Richtek Technology Corporation is believed to be accurate and reliable. Richtek reserves the right to make any change in circuit design, specification or other related things if necessary without notice at any time ...