MP2315SGJ
Synchronous Buck ConverterThe MP2315SGJ is a synchronous buck converter from Monolithic Power Systems. View the full MP2315SGJ datasheet below including key specifications, electrical characteristics, absolute maximum ratings.
MP2315SGJ shares its datasheet with MP2315, whose page lists every part number it covers.
Official MP2315SGJ datasheet (PDF) — the source this page was extracted from.
MP2315SGJ Key Specifications
| Parameter | Value |
|---|---|
| Output Current | 3A |
| Switching Frequency | 500kHz |
| Function | Step-Down |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Output Configuration | Positive |
| Output Type | Adjustable |
| Package / Case | SOT-23-8 Thin, TSOT-23-8 |
| Packaging | Cut Tape |
| Standard Pack Qty | 3000 |
| Supplier Device Package | TSOT-23-8 |
| Synchronous Rectifier | Yes |
| Topology | Buck |
| Input Voltage (Max) | 24V |
| Input Voltage (Min) | 4.5V |
| Output Voltage (Max) | 22.8V |
| Output Voltage | 0.8V |
MP2315SGJ Overview
Part: MP2315SGJ — Monolithic Power Systems (MPS)
Type: Synchronous Buck (Step-Down) Converter
Description: 4.5–24 V input, 3 A synchronous step-down converter with 110 mΩ/55 mΩ integrated MOSFETs, fixed 500 kHz switching frequency and adjustable output from 0.8 V.
Operating Conditions:
- Supply voltage: 4.5–24 V
- Operating junction temperature: -40 to +125 °C
- Output voltage: 0.8 V to VIN × DMAX
- Switching frequency: 500 kHz fixed
Absolute Maximum Ratings:
- Max supply voltage (VIN): 26 V
- VSW: -0.3 V to +28 V (30 V for <10 ns)
- VBST: VSW + 6 V
- Max junction temperature: 150 °C
- Storage temperature: -65 to 150 °C
- Lead temperature: 260 °C
- Continuous power dissipation (TA = 25 °C): 1.25 W
Key Specs:
- Feedback voltage: 783 / 791 / 800 mV (min/typ/max)
- Current limit: 4.5 / 5.5 / 6.5 A (duty cycle = 40%)
- Oscillator frequency: 400 / 500 / 600 kHz (VFB = 750 mV)
- Shutdown supply current: 1 μA max (VEN = 0 V, TJ = 25 °C)
- Quiescent current: 120 μA typ (VEN = 2 V, VFB = 0.85 V, AAM = 0.4 V)
- HS/LS RDS(ON): 110 mΩ / 55 mΩ typ
- Maximum duty cycle: 95% typ (90% min)
- Minimum on-time: 60 ns typ
- VIN UVLO rising threshold: 3.85 / 4.05 / 4.25 V
- Soft-start time: 1.5 ms typ (10% to 90%)
- Thermal shutdown: 150 °C with 20 °C hysteresis
- Thermal resistance θJA / θJC (TSOT23-8): 100 / 55 °C/W
Features:
- Wide 4.5–24 V input range
- 3 A continuous load current
- Low RDS(ON) internal power MOSFETs
- AAM power-save mode for light-load efficiency
- Internal soft start
- Over-current protection with hiccup
- Output over-voltage protection
- Thermal shutdown
- Internal 5.1 V VCC regulator
- Lead-free, halogen-free, RoHS compliant
Applications:
- Notebook systems and I/O power
- Flat panel televisions and monitors
- Digital set-top boxes
Package:
- TSOT23-8
MP2315SGJ Features
- Wide 4.5V to 24V Operating Input Range
- 110m Ω /55m Ω Low RDS(ON) Internal Power MOSFETs
- 3A Load Current
- Low Quiescent Current
- High-Efficiency Synchronous Mode Operation
- Fixed 500kHz Switching Frequency
- AAM Power Save Mode
- Internal Soft Start
- Over-Current Protection (OCP) and Hiccup
- Output Over-Voltage Protection (OVP)
- Thermal Shutdown
- Available in a TSOT23-8 Package
- Output Adjustable from 0.8V
MP2315SGJ Applications
- Notebook Systems and I/O Power
- Flat Panel Television and Monitors
- Digital Set-Top Boxes
All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive. For MPS green status, please visit the MPS website under quality assurance. 'MPS' and 'The Future of Analog IC Technology' are registered trademarks of Monolithic Power Systems, Inc.
MP2315SGJ Pin Configuration
| Pin # | Name | Description |
|---|---|---|
| 1 | AAM | Advanced asynchronous modulation. Connect AAM to a voltage supply through a resistor divider to force the MP2315S into non-synchronous mode under light-load conditions. Tie AAM to VCC or leave AAM floating to disable AAM mode and force the MP2315S into CCM. |
| 2 | IN | Supply voltage. The MP2315S operates with a 4.5V to 24V input rail. C1 is needed to decouple the input rail. Connect using a wide PCB trace. |
| 3 | SW | Switch output. Connect using a wide PCB trace. |
| 4 | GND | System ground. GND is the reference ground of the regulated output voltage. GND requires special consideration during PCB layout. Connect GND with copper traces and vias. |
| 5 | BST | Bootstrap. A capacitor and a resistor are required between SW and BST to form a floating supply across the high-side switch driver. |
| 6 | EN | Enable. Drive EN high to enable the MP2315S. |
| 7 | VCC | Internal bias supply, internal 5.1V LDO output. Decouple VCC with a 0.1 μ F - 0.22 μ F capacitor. The capacitance should be no more than 0.22 μ F. |
| 8 | FB | Feedback. Connect FB to the tap of an external resistor divider from the output to GND to set the output voltage. The frequency foldback comparator lowers the oscillator frequency when the FB voltage is below 400mV to prevent current-limit runaway during a short-circuit fault condition. |
MP2315SGJ Electrical Characteristics
VIN = 12V, TJ = -40°C to +125°C. (6) Typical value is tested at TJ = +25°C, unless otherwise noted.
| Parameter | Symbol | Condition | Min | Typ | Max | Units |
|---|---|---|---|---|---|---|
| Supply current (shutdown) | I IN | V EN = 0V, T J = 25°C | 1 | μ A | ||
| Supply current (quiescent) | I q | V EN = 2V, V FB = 0.85V, AAM = 0.4V | 120 | μ A | ||
| HS switch on resistance | HS RDS-ON | V BST-SW = 5V | 110 | m Ω | ||
| LS switch on resistance | LS RDS-ON | V CC = 5V | 55 | m Ω | ||
| Switch leakage | SW LKG | V EN = 0V, V SW = 12V, T J = 25°C | 1 | μ A | ||
| Current limit | I LIMIT | Duty cycle = 40% | 4.5 | 5.5 | 6.5 | A |
| Oscillator frequency | f SW | V FB = 750mV | 400 | 500 | 600 | kHz |
| Foldback frequency | f FB | V FB = 200mV | 0.5 | f SW | ||
| Maximum duty cycle | D MAX | V FB = 750mV | 90 | 95 | % | |
| Minimum on time (7) | T ON_MIN | 60 | ns | |||
| Feedback voltage | V FB | 783 | 791 | 800 | mV | |
| Feedback current | I FB | V FB = 820mV | 10 | 50 | nA | |
| EN rising threshold | V EN_RISING | 1.26 | 1.4 | 1.54 | V | |
| EN hysteresis | V EN_HYS | 150 | mV | |||
| EN input current | I EN | V EN = 2V | 1 | 2 | 3 | μ A |
| EN input current | I EN | V EN = 0 | 0 | 50 | nA | |
| EN turn-off delay | EN Td-off | 5 | 9 | 13 | μ s | |
| V IN under-voltage lockout threshold rising | INUV Vth | 3.85 | 4.05 | 4.25 | V | |
| V IN under-voltage lockout threshold hysteresis | INUV HYS | 600 | 750 | 900 | mV | |
| VCC regulator | V CC | 4.85 | 5.1 | 5.35 | V | |
| VCC load regulation | I CC = 5mA | 1.5 | % | |||
| Soft-start period | T SS | 10% to 90% | 0.8 | 1.5 | 2.2 | ms |
| Thermal shutdown (7) | T SD | 150 | °C | |||
| Thermal hysteresis (7) | T HYS | 20 | °C | |||
| AAM source current | I AAM | 6.7 | μ A | |||
| OVP rising threshold | OV H _ RISE | FB voltage | 115% | 120% | 125% | VREF |
| OVP falling threshold | OV L _ FALL | FB voltage | 104% | 109% | 114% | VREF |
| OVP delay (7) | OV DEY | 2 | μ s |
MP2315SGJ Absolute Maximum Ratings
| Parameter | Limit |
|---|---|
| V IN | -0.3V to +26V |
| V SW | -0.3V (-5V < 10ns) to +28V (30V < 10ns) |
| V BST | V SW + 6V |
| All other pins | -0.3V to +5.5V (2) |
| Continuous power dissipation (T A = +25°C) (3) ... | 1.25W |
| Junction temperature | 150°C |
| Lead temperature | 260°C |
| Storage temperature | -65°C to 150°C |
| Recommended Operating Conditions (4) Supply voltage (V ) | 4.5 to 24V |
| IN | |
| Output voltage (V OUT ) | 0.8V to V IN * D MAX |
| Operating junction temp (T J ). ... -40°C to +125°C |
Thermal Resistance (5) θ JA θ JC
TSOT23-8…………………....…..100…..55...°C/W
MP2315SGJ Thermal Information
Thermal shutdown is implemented to prevent the chip from operating at exceedingly high temperatures. When the silicon die temperature is higher than 150°C, the entire chip shuts down. When the temperature is lower than its lower threshold, typically 130°C, the chip is enabled again.
MP2315SGJ Typical Application
Variants on the same datasheet
These parts have exact links to the same datasheet. They are candidates to compare, not verified drop-in replacements; check package, pinout and electrical limits.
| Part Number | Manufacturer | Package |
|---|---|---|
| MP2315 | Monolithic Power Systems | TSOT23-8 |
| MP2315S | Monolithic Power Systems | TSOT23-8 |
| MP2315SGJ-Z | Monolithic Power Systems | SOT-23-8 Thin, TSOT-23-8 |
Other Switching Regulators (Buck)
- TPS54302 – Texas Instruments, Synchronous Step-Down Converter
- MAX20730 – Analog Devices, Synchronous Switching Regulator
- TLV62568 – Texas Instruments, Synchronous Buck Converter
- LM2596 – Texas Instruments, Step-Down Voltage Regulator
- TPS562200 – Texas Instruments, Synchronous Buck Converter
- AP63203WU – Diodes Incorporated, Synchronous Buck Converter
- TPS54202 – Texas Instruments, Synchronous Buck Converter
- AP63357DV-7 – Diodes Incorporated, Synchronous Buck Converter
All Switching Regulators (Buck) datasheetsAll Monolithic Power Systems datasheets (40)
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