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LTC4079EDD#TRPBF
Public Made by Adomby adom
Analog Devices Battery Management ICs, DFN-10-EP(3x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
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LTC4079EDD#TRPBF
Analog Devices · Battery Management ICs · DFN-10-EP(3x3)
LTC4079EDD#TRPBF from Analog Devices, in a DFN-10-EP(3x3). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | IN | power_in | Input supply pin that powers the battery charger, with an operating supply range of 2.7V to 60V and a recommended bypass of a ceramic capacitor of at least 1µF. |
| 2 | EN | input | Enable input where charge current starts when it rises above the 1.190V regulation threshold, the device shuts down when pulled below 0.750V, and the pin should not be left floating. |
| 3 | PROG | passive | Charge current program pin whose current is 1/250th of the BAT pin current, servos to 1.190V in constant-current mode, must not be left open, and should have less than 50pF of parasitic capacitance. |
| 4 | NTCBIAS | output | NTC thermistor bias output that connects through a low drift bias resistor to the NTC pin, with parasitic capacitance on this pin minimized. |
| 5 | NTC | input | Input to the battery temperature sense circuit, where the room temperature thermistor value should be at least 2kΩ and tying the pin to GND disables battery temperature sensing. |
| 6 | TIMER | passive | Timer capacitor input that sets the maximum charge duration using CTIMER = tTIMER × 18.2nF/Hr, where a typical 100nF terminates charging after 5½ hours, and tying the pin to GND disables the timer. |
| 7 | CHRG | output | Open-drain charge status output that is pulled low by an internal NMOS while charging and goes high impedance when the charge current drops below 1/10th of the programmed current or the charge cycle is timer terminated. |
| 8 | FBG | passive | Ground reference for the battery voltage divider that connects internally to ground through an NMOS switch during charging, presenting RFBG = 160Ω when sensing the battery voltage. |
| 9 | FB | input | Sense pin for the divided battery voltage that servos to 1.170V (VFB(CHG)) during the constant-voltage phase, requiring minimal leakage and parasitic capacitance. |
| 10 | BAT | power_out | Battery charger output that provides charge current to the battery, with an absolute maximum BAT current of -400mA. |
| 11 | GND | power_in | Ground on the exposed pad, which must be soldered to a continuous ground plane of the PCB for electrical connection and the rated thermal performance. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices |
| Package | DFN-10-EP(3x3) |
| Category | Power Management ICs |
| Pins | 11 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Voltage on IN, BAT, EN, CHRG, FB, FBG | -0.3 | 62 | V | 2 | |||
| PROG, TIMER Voltage | 3 | V | 2 | ||||
| BAT Current | -400 | mA | 2 | ||||
| PROG Current | -1.6 | mA | 2 | ||||
| FBG Current | 2 | mA | 2 | ||||
| CHRG Current | 2 | mA | 2 | ||||
| Operating Junction Temperature Range | TJ | -40 | 125 | °C | Notes 3, 5 | 2 | |
| Storage Temperature Range | -65 | 150 | °C | 2 | |||
| Maximum Junction Temperature | TJMAX | 125 | °C | 2 | |||
| Thermal resistance, junction to ambient (DD package) | θJA | 43 | °C/W | 2 | |||
| VIN Operating Supply Voltage | VIN | 2.7 | 60 | V | 3 | ||
| VBAT Battery Voltage Range | VBAT | 60 | V | 3 | |||
| VIN Undervoltage Lockout threshold | VUVLO | 2.55 | 2.7 | V | VIN Rising | 3 | |
| VIN Undervoltage Lockout Hysteresis | 140 | mV | 3 | ||||
| Differential Undervoltage Lockout threshold | VDUVLO | -20 | 15 | 50 | mV | VIN-VBAT Rising | 3 |
| Differential Undervoltage Lockout Hysteresis | VDUVLO | 80 | mV | 3 | |||
| Differential Voltage Regulation Minimum VIN-VBAT for Charge Current | VDVREG | 120 | 160 | 200 | mV | 3 | |
| Input Supply Quiescent Current | IQ(IN) | 4 | 9 | µA | Charging (Note 4) | 3 | |
| Input Supply Quiescent Current | IQ(IN) | 2 | 4 | µA | Charging Terminated (VFB = 1.210V) | 3 | |
| Input Supply Quiescent Current | IQ(IN) | 0.2 | 0.6 | µA | Shutdown (EN = 0) | 3 | |
| Battery Drain Current | IQ(BAT) | 0.01 | 0.2 | µA | Charging Terminated (VFB =1.210V) | 3 | |
| Battery Drain Current | IQ(BAT) | 0 | 0.2 | µA | Shutdown (EN = 0) | 3 | |
| Battery Drain Current | IQ(BAT) | 0.05 | 0.2 | µA | VIN = 0 or IN open | 3 | |
| Feedback Pin Regulation Voltage in Constant-Voltage Charge Mode | VFB(CHG) | 1.165 | 1.17 | 1.175 | V | 3 | |
| Feedback Pin Regulation Voltage in Constant-Voltage Charge Mode | VFB(CHG) | 1.156 | 1.17 | 1.184 | V | 3 | |
| Battery Charge Current in Constant-Current Mode | ICHG | 236 | 248 | 260 | mA | RPROG = 1.2k | 3 |
| Battery Charge Current in Constant-Current Mode | ICHG | 93 | 99 | 105 | mA | RPROG = 3k | 3 |
| Battery Charge Current in Constant-Current Mode | ICHG | 8.5 | 10 | 11.5 | mA | RPROG = 30k | 3 |
| Charging Termination Threshold | ITERMINATE | 22 | 25 | 28 | mA | RPROG = 1.2k | 3 |
| Charging Termination Threshold | ITERMINATE | 8.2 | 10 | 11.8 | mA | RPROG = 3k | 3 |
| Charging Termination Threshold | ITERMINATE | 0.7 | 1 | 1.3 | mA | RPROG = 30k | 3 |
| Deglitch Filter on C/10 Charge Termination | tTERMINATE | 5 | 9 | 13 | ms | ICHG Drops Below Termination Threshold | 3 |
| Safety Timer Accuracy | tTIMER | -10 | 10 | % | 3 | ||
| Recharge Threshold Voltage of FB Pin Relative to VFB(CHG) | VRECHRG | 96.9 | 97.6 | 98.3 | % | with VFB Falling | 3 |
| Low Battery Threshold | VFB(LOWBAT) | 0.78 | 0.8 | 0.82 | V | 3 | |
| Feedback Pin Leakage | IFB | 0.1 | 20 | nA | VFB = 1.170V (in Regulation) | 3 | |
| Feedback Pin Leakage | IFB | 0.1 | 100 | nA | VFB = 8.4V (in Shutdown) | 3 | |
| Feedback Ground Pin Leakage | IFBG | 0.1 | 100 | nA | VFBG = 8.4V, EN = 0 | 3 | |
| VCOLD Low Temp. Fault NTC Threshold Voltage | VCOLD | 72.3 | 73.8 | 75.3 | % | VNTC/VNTCBIAS | 4 |
| VHOT High Temp. Fault NTC Threshold Voltage | VHOT | 35.6 | 36.6 | 37.6 | % | VNTC/VNTCBIAS | 4 |
| NTC Disable Voltage Threshold | VNTC(DIS) | 60 | 80 | 100 | mV | VNTC | 4 |
| NTC Input Leakage Current | 0.1 | 100 | nA | VNTC = VNTCBIAS | 4 | ||
| Shutdown Threshold | VEN(SD) | 0.4 | 0.75 | 1.1 | V | VEN Falling | 4 |
| Enable Pin Regulation Voltage Minimum VEN for Charge Current | VEN(REG) | 1.17 | 1.19 | 1.21 | V | Minimum VEN for Charge Current | 4 |
| Enable Pin Leakage Current When Pulled High | 0 | 20 | nA | VEN = 60V | 4 | ||
| Status Output Low Voltage | 0.16 | 0.4 | V | 1mA Into the Open-Drain Output | 4 | ||
| Status Output Leakage Current | 0.1 | 100 | nA | VCHRG = 60V, VEN = 0V | 4 | ||
| Battery Charge Current Termination Threshold Hysteresis | 55 | mV | 4 | ||||
| Ratio of BAT Current to PROG Pin Current | 250 | mA/mA | 3 | ||||
| Regulated Voltage on PROG Pin in Constant-Current Mode | 1.19 | V | 3 | ||||
| Low Battery Time Out (Percentage of Safety Timer) | 18 | % | Charging with VFB < VFB(LOWBAT) | 3 | |||
| Resistance of the Charge Path | RON | 5 | Ω | 3 | |||
| Switch Resistance from FBG Pin to GND | RFBG | 160 | Ω | 3 | |||
| Die Temperature (TJ) at Thermal Regulation | TJ | 118 | °C | 3 | |||
| Pulsed NTCBIAS Voltage | 4 | V | 20k from NTCBIAS to Ground | 4 | |||
| NTCBIAS Period | 3 | Sec | 4 | ||||
| NTCBIAS Pulse Width | 210 | µs | 4 |
CAD (KiCad official)
- Symbol:
LTC4079EDD#TRPBF - Footprint:
Package_DFN_QFN:DFN-10-1EP_3x3mm_P0.5mm_EP1.55x2.48mm - 3D model: DFN-10-EP(3x3) (KiCad packages3D, STEP)
- 3D model files:
ltc4079edd-trpbf-etched.step/ltc4079edd-trpbf-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ltc4079edd-trpbf.step/ltc4079edd-trpbf.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Analog Devices datasheet (20 pp, sha256
d1866d55d66d6f92, retrieved 2026-10-30, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).