4 layers82.6 × 82.5 mm
Overview
The LT1054CP is a DC DC Converter made by Texas Instruments in a PDIP-8 package with 8 pins. -5V 0℃~+70℃ 100mA 10Ω 2.5mA 25kHz 3.5V~15V Inverted Low-power standby、Adaptive switching frequency PDIP-8 Charge Pumps ROHS.
PCBKit's library has its KiCad symbol (Regulator_SwitchedCapacitor:LT1054, from KiCad's library) and its footprint (Package_DIP:DIP-8_W8.89mm_SMDSocket_LongPads, from KiCad's library), ready for a KiCad board. 519 are in stock at JLCPCB (part C1355744). 19 open-source boards in 11 repositories on GitHub use it.
Symbol
Footprint
From the datasheet
14- Supply, least
- 3.5 V · VCC, recommended operating min · p. 4
- Supply, most
- 15 V · VCC, recommended operating max · p. 4
- Supply, absolute maximum
- 16 V · VCC, absolute max for unregulated circuits · p. 4
- Supply, absolute maximum
- 20 V · VCC, absolute max in regulation mode with VOUT ≤ 15 V · p. 4
- Works from
- 0 °C · LT1054C free-air temperature min · p. 4
- Works up to
- 70 °C · LT1054C free-air temperature max · p. 4
- Junction, hottest
- 125 °C · LT1054C junction temperature absolute max · p. 4
- Takes working
- 2.5 mA · VCC supply current typical, VCC = 3.5 V, IO = 0 · p. 5
- Takes working
- 3 mA · VCC supply current typical, VCC = 15 V, IO = 0 · p. 5
- Takes asleep
- 100 µA · Shutdown supply current typical, V(FB/SD) = 0 V · p. 5
- Gives
- 100 mA · Rated output current · p. 1
- Feedback reference
- 2.5 V · Vref typical, I(REF) = 60 uA, TA = 25°C · p. 5
- Switches at
- 25 kHz · Oscillator frequency typical, VCC = 3.5 V to 15 V · p. 5
- Junction to air (P (PDIP))
- 85 K/W · Junction-to-ambient thermal resistance · p. 4
What it is and has
5- Regulation
- Reference and error amplifier · p. 1
- Shutdown
- External shutdown · p. 1
- Oscillator
- External synchronization · p. 1
- Parallel operation
- Devices can be paralleled · p. 1
- Oscillator
- External oscillator synchronization · p. 1
Around it
5- cap 10 μF
- between CAP+ and CAP-; CIN, tantalum, regulation test configuration. · p. 5
- cap 100 μF
- between VOUT and GND; COUT, tantalum, regulation test configuration; positive terminal to GND. · p. 5
- cap 5pF to 20pF
- between CAP+ and OSC; C2; raises oscillator frequency. · p. 10
- res 20k
- between OSC and VREF; Recommended pull-up for external oscillator synchronization. · p. 11
- cap 2µF minimum
- between VCC and GND; Input supply bypass; preferably tantalum or another low ESR type. Larger capacitance may be desirable with long supply leads. · p. 23
Specifications
23| Parameter | Conditions | As printed | Page |
|---|---|---|---|
| Supply voltage VCC | Unregulated circuits; over operating free-air temperature range | max 16 V | 4 |
| Input voltage VI | FB/SD; maximum VCC | min 0 V | 4 |
| Input voltage VI | OSC; maximum Vref | min 0 V | 4 |
| Junction temperature TJ | LT1054C | max 125 °C | 4 |
| Storage temperature Tstg | min -55 · max 150 °C | 4 | |
| Electrostatic discharge V(ESD) | Human body model (HBM), per ANSI/ESDA/JEDEC JS-001; rating ±500 V | max 500 V | 4 |
| Electrostatic discharge V(ESD) | Charged-device model (CDM), per JEDEC specification JESD22-C101; rating ±3500 V | max 3500 V | 4 |
| Supply voltage VCC | Over operating free-air temperature range | min 3.5 · max 15 V | 4 |
| Operating free-air temperature range TA | LT1054C | min 0 · max 70 °C | 4 |
| Junction-to-ambient thermal resistance RθJA | P (PDIP), 8 pins | typ 85 °C/W | 4 |
| Regulated output voltage VO | LT1054C; VCC = 7 V, TJ = 25°C, RL = 500 Ω; TA = 25°C; regulation configuration in footnote (3) | min -4.7 · typ -5 · max -5.2 V | 5 |
| Input regulation | LT1054C; VCC = 7 V to 12 V, RL = 500 Ω; full temperature range; regulation configuration in footnote (3) | typ 5 · max 25 mV | 5 |
| Output regulation | LT1054C; VCC = 7 V, RL = 100 Ω to 500 Ω; full temperature range; regulation configuration in footnote (3) | typ 10 · max 50 mV | 5 |
| Voltage loss, VCC − |VO| | LT1054C; CI = CO = 100-uF tantalum; IO = 10 mA; full temperature range; voltage inverter with terminals 1, 6, and 7 unconnected | typ 0.35 · max 0.55 V | 5 |
| Voltage loss, VCC − |VO| | LT1054C; CI = CO = 100-uF tantalum; IO = 100 mA; full temperature range; voltage inverter with terminals 1, 6, and 7 unconnected | typ 1.1 · max 1.6 V | 5 |
| Output resistance | LT1054C; ΔIO = 10 mA to 100 mA; full temperature range; slope of ΔVO versus ΔIO | typ 10 · max 15 Ω | 5 |
| Oscillator frequency | LT1054C; VCC = 3.5 V to 15 V; full temperature range | min 15 · typ 25 · max 35 kHz | 5 |
| Reference voltage Vref | LT1054C; I(REF) = 60 uA; TA = 25°C | min 2.35 · typ 2.5 · max 2.65 V | 5 |
| Reference voltage Vref | LT1054C; I(REF) = 60 uA; full temperature range | min 2.25 · max 2.75 V | 5 |
| Maximum switch current | LT1054C; TA = 25°C | typ 300 · max 4 mA | 5 |
| Supply current ICC | LT1054C; IO = 0; VCC = 3.5 V; full temperature range | typ 2.5 · max 5 mA | 5 |
| Supply current ICC | LT1054C; IO = 0; VCC = 15 V; full temperature range | typ 3 · max 200 mA | 5 |
| Supply current in shutdown | LT1054C; V(FB/SD) = 0 V; full temperature range | typ 100 uA | 5 |
Pins, by the datasheet
8- 1 FB/SD
- Shutdown for low Iq operation or error amplifier input for regulation. · p. 3
- 2 CAP+
- Positive side of CIN. · p. 3
- 3 GND
- Ground. · p. 3
- 4 CAP-
- Negative side of CIN. · p. 3
- 5 VOUT
- Regulated output voltage. · p. 3
- 6 VREF
- Internal reference voltage. · p. 3
- 7 OSC
- Oscillator control pin. · p. 3
- 8 VCC
- Supply pin. · p. 3
Ordering codes, by the datasheet
3- LT1054CP
- PDIP (P) · 8 pins, 0 to 70 °C, 50 per tube · p. 26
- LT1054CP.A
- PDIP (P) · 8 pins, 0 to 70 °C, 50 per tube · p. 26
- LT1054CPE4
- PDIP (P) · 8 pins, 0 to 70 °C, 50 per tube · p. 26
Parameters
16- Features
- Adaptive switching frequency
- Frequency - Switching
- 25kHz
- Function
- Inverted
- Junction Temperature(Max)
- 125℃
- Operating Temperature
- 0℃~+70℃
- Operating Voltage
- 3.5V~15V
- Output Current
- 100mA
- Output Resistance
- 10Ω
- Output Voltage
- -5V
- Quiescent Current
- 2.5mA
- Reference Voltage
- 2.5V
- Standby Current
- 100uA
- Switching Frequency
- 25kHz
- Thermal Resistance(Junction to Ambient)
- 85℃/W
- Voltage - Supply
- 3.5V~15V
- Voltage - Supply(Absolute Max)
- 16V
Order codes
1- LT1054CPLCSC C1355744
Pinout
8| Pin | Name | Type |
|---|---|---|
| 1 | FB/SHDN | Input |
| 2 | CAP+ | Input |
| 3 | GND | Power in |
| 4 | CAP- | Input |
| 5 | -VOUT | Power out |
| 6 | VREF | Output |
| 7 | OSC | Input |
| 8 | V+ | Power in |
Open-source boards using it
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- 4 layers160 × 100 mm
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Is there a KiCad symbol and footprint for the LT1054CP?
Yes. The symbol is Regulator_SwitchedCapacitor:LT1054 and the footprint Package_DIP:DIP-8_W8.89mm_SMDSocket_LongPads, both drawn on this page. PCBKit places them on a board for you when you design with it.
What package is the LT1054CP?
PDIP-8, with 8 pins. Its footprint is drawn on this page.
Where is the LT1054CP datasheet?
Texas Instruments publishes it: the Datasheet link on this page opens it.
Where can I order the LT1054CP?
JLCPCB lists it as part C1355744, with 519 in stock; the sellers' links on this page open their listings.
What can replace the LT1054CP?
Parts like it in the library: the TPS6735IP by Texas Instruments, the MAX635AEPA+ by Maxim Integrated (Analog Devices), the MAX735CPA by Maxim Integrated (Analog Devices) and the MAX735CPA+ by Maxim Integrated (Analog Devices). Check their datasheets: a part that fits the footprint may still differ in its ratings.
Which open-source boards use the LT1054CP?
19 boards in 11 repositories on GitHub; the most starred are listed on this page, with their KiCad files.
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