LM5116MH/NOPB National Semiconductor, LM5116MH/NOPB Datasheet
LM5116MH/NOPB
Specifications of LM5116MH/NOPB
Related parts for LM5116MH/NOPB
LM5116MH/NOPB Summary of contents
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... The device is available in a power enhanced TSSOP-20 package featuring an exposed die attach pad to aid thermal dissipation. Typical Application © 2010 National Semiconductor Corporation LM5116 Features ■ Emulated peak current mode ■ ...
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Connection Diagram Ordering Information Ordering Number Package Type LM5116MH TSSOP-20EP LM5116MHX TSSOP-20EP Pin Descriptions Pin Name Description 1 VIN Chip supply voltage, input voltage monitor and input to the VCC regulator. 2 UVLO If the UVLO pin is below 1.215V, ...
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Pin Name Description 12 CS Current sense amplifier input. Connect to the top of the current sense resistor or the drain of the low-sided MOSFET if R current sensing is used. DS(ON) 13 CSG Current sense amplifier input. Connect to ...
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... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. VIN to GND VCC, VCCX, UVLO to GND (Note 3) SW GND VOUT to GND CSG to GND LO to GND SS to GND FB to GND DEMB to GND Electrical Characteristics junction temperature range of -40° ...
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Symbol Parameter Soft Start SS Current Source SS Diode Emulation Ramp Disable Threshold Offset SS Output Low Voltage Error Amplifier V FB Reference Voltage REF FB Input Bias Current COMP Sink/Source Current A DC Gain OL f ...
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Symbol Parameter HO Gate Driver V HO Low-state Output Voltage OLH V HO High-state Output Voltage OHH HO Rise Time HO High-side Fall Time I Peak HO Source Current OHH I Peak HO Sink Current OLH under-voltage ...
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Typical Performance Characteristics Typical Application Circuit Efficiency Driver Dead-time vs Temperature Driver Sink Current vs VCC Driver Source Current vs VCC 30007503 HO High R 30007505 HO Low R 30007507 7 30007504 vs VCC DS(ON) 30007506 vs VCC DS(ON) 30007508 ...
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LO High R DS(ON) LO Low R DS(ON) Forced HO Off-time vs Temperature VCCX = 5V www.national.com vs VCC 30007509 vs VCC 30007511 30007513 8 EN Input Threshold vs Temperature 30007510 UVLO vs Temperature 30007512 HB DC ...
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Frequency 30007515 Frequency vs Temperature 30007517 Frequency vs Temperature 30007519 Error Amp Gain vs Frequency Error Amp Phase vs Frequency Current Limit Threshold vs Temperature 9 30007516 30007518 30007520 www.national.com ...
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VIN Operating Current vs Temperature VCC UVLO vs Temperature VCC vs ICC www.national.com VCC vs Temperature 30007521 30007523 VCCX Switch R 30007525 10 30007522 VCC vs VIN 30007524 vs VCCX DS(ON) 30007526 ...
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Block Diagram and Typical Application Circuit 11 www.national.com ...
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Detailed Operating Description The LM5116 high voltage switching regulator features all of the functions necessary to implement an efficient high voltage buck regulator using a minimum of external components. This easy to use regulator integrates high-side and low-side MOS- FET ...
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FIGURE 5. EN Bias Current vs Voltage UVLO An under-voltage lockout pin is provided to disable the regu- lator without entering shutdown. If the UVLO pin is pulled below 1.215V, the regulator enters a standby mode of oper- ation with ...
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The sample-and-hold DC level is derived from a measure- ment of the recirculating current through either the low-side MOSFET or current sense resistor. The voltage level across the MOSFET or sense resistor is sampled and held just prior to the ...
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To further protect the external switches during prolonged current limit conditions, an internal counter counts clock pulses when in current limit. When the counter detects 256 consecutive clock cycles, the regulator enters a ...
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During this initial charging voltage, the LM5116 will force diode emulation. That is, the low-side MOSFET will turn off for the remainder of a cycle if the sensed inductor current becomes negative. The inductor current is sensed ...
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Higher ripple current allows for a smaller inductor size, but places more of a burden on the output capacitor to smooth the ripple current for low output ripple voltage. For this example, 40% ripple current was chosen for a ...
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The converter exhibits a negative input impedance which is lowest at the minimum input voltage: The damping factor for the input filter is given by: Where R is the input wiring resistance and ESR is the series IN resistance of ...
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The voltage at the UVLO pin should never exceed 16V when using an external set-point divider. It may be necessary to clamp the UVLO pin at high input voltages. For the design example 102kΩ and R = 21kΩ ...
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FIGURE 11. Modulator Gain and Phase Components R and C configure the error amplifier COMP COMP as a type II configuration. The DC gain of the amplifier is 80dB which has a pole at low frequency and a zero at ...
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The regulator has an exposed thermal pad to aid power dis- sipation. Selecting MOSFETs with exposed pads will aid the power dissipation of these devices. Careful attention high temperature should be observed. Also, at 250 kHz, (ON) ...
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MODULATOR TRANSFER FUNCTION The following equations can be used to calculate the control- to-output transfer function the effective DC gain of the modulating comparator. The m duty cycle the proportional ...
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TABLE 1. Bill of Materials for 7V-60V Input Output, 250kHz ID Part Number C1, C2, C14 C2012X7R1E105K C3 VJ0603Y103KXAAT C4 VJ0603A271JXAAT C5, C15 VJ0603Y101KXAT W1BC C6 VJ0603Y332KXXAT C7 C8, C9, C10, C4532X7R2A225M C11 C12 C3225X7R2A105M C13 C2012X7R2A104M C16, ...
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Physical Dimensions inches (millimeters) unless otherwise noted TSSOP-20EP Outline Drawing NS Package Number MXA20A 25 www.national.com ...
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