LM2757TMEV National Semiconductor, LM2757TMEV Datasheet
LM2757TMEV
Specifications of LM2757TMEV
Related parts for LM2757TMEV
LM2757TMEV Summary of contents
Page 1
... LM2757 is a tiny 1 1.6 mm 12–bump micro SMD device. Built in soft-start, over-current protection, and thermal shutdown features are also included in this device. Typical Application Circuit © 2009 National Semiconductor Corporation LM2757 Features ■ Dual gain converter (2x, 3/2x) with up to 93% Efficiency. ...
Page 2
... Order Information Order Number LM2757TM LM2757TMX www.national.com 12–Bump Micro SMD Package, 0.4mm Pitch National Semiconductor Package Number TMD12 Flying Capacitor C2 Connection Regulated Output Voltage Flying Capacitor C1 Connection Flying Capacitor C1 Connection Input Voltage Connection Input Voltage Connection Ground Connection Ground Connection Flying Capacitor C2 Connection No Connect — ...
Page 3
... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. V Pin: Voltage to GND IN M0, M1 pins: Voltage to GND Continuous Power Dissipation (Note 4) Junction Temperature (T ) J-MAX Storage Temperature Range Maximum Lead Temperature (Soldering, 10 sec.) ...
Page 4
Symbol Parameter V Logic Input Low IL Logic Input Pulldown R PULLDOWN Resistance (M0, M1) I Logic Input High Current IH I Logic Input Low Current IL V Gain Transition Voltage G I Short Circuit Output Current SC V Turn-On ...
Page 5
Block Diagram 5 30033703 www.national.com ...
Page 6
Typical Performance Characteristics 0.47µ 1.0µ OUT Efficiency vs. Input Voltage, 5V Mode Efficiency vs. Input Voltage, 4.1V Mode Output Voltage vs. Output Current, 4.5V Mode ...
Page 7
Output Voltage Ripple vs. Output Current, 5V Mode Output Voltage vs. Input Voltage, 4.5V Mode Output Leakage Current, Device Shutdown Output Voltage vs. Input Voltage, 5V Mode 30033710 Output Voltage vs. Input Voltage, 4.1V Mode 30033712 Output Leakage Current, Device ...
Page 8
Current Limit vs. Input Voltage Operating Current vs. Input Voltage Startup Behavior, 5V Mode V = 3.6V, Load = 200mA IN CH2 Scale: 1V/Div, DC Coupled OUT CH4 Scale: 200mA/Div, DC Coupled IN Time scale: 100µs/Div ...
Page 9
Load Step with a Li-Ion Battery, 10mA to 200mA Mode BATT OUT CH1 Scale: 50mV/Div, AC Coupled OUT CH4 Scale: 100mA/Div, DC Coupled OUT Time scale: 10µs/Div Load Step with ...
Page 10
Operation Description OVERVIEW The LM2757 is a switched capacitor converter that produces a regulated output voltage of either 5V, 4.5V or 4.1V depend- ing on the mode selected. The core of the part is a highly efficient charge pump that ...
Page 11
LM2757 due to their high ESR, as compared to ceramic capacitors. For most applications, ceramic capacitors with an X7R or X5R temperature characteristic are preferred for use with the LM2757. These capacitors have tight capacitance tolerance ...
Page 12
RECOMMENDED CAPACITANCE The data in Table 1 can be used to assist in the selection of capacitance for each node that best balances solution size and cost with the electrical requirements of the application. As previously discussed, input and output ...
Page 13
Application Circuits USB OTG / Mobile HDMI POWER SUPPLY The 5V output mode will normally be used for the USB OTG / Mobile HDMI application. Therefore the LM2757 can be en- abled/disabled by applying a logic signal on only the ...
Page 14
LED DRIVER The 5.0V, 4.5V, or the 4.1V mode can be used depending on the forward voltage and load requirements of the LED appli- cation. The LM2757 can be enabled/disabled by applying the appropriate combination of logic signals on the ...
Page 15
Physical Dimensions inches (millimeters) unless otherwise noted NSC Package TMD12AAA Micro SMD Wafer Level Package X1: 1215 µm +/- 30 µm X2: 1615 µm +/- 30 µm X3: 600 µm +/- 75 µm Bump pitch: 0 www.national.com ...
Page 16
... For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www ...