MCP1602-ADJI/MS Microchip Integrated Circuit (Small Outline Packages) In Stock
The MCP1602-ADJI/MS is a 20 MHz synchronous buck regulator from Microchip with adjustable output, 500 mA output current, and dual PFM/PWM mode operation across a 2.7 V to 5.5 V input range. Housed in an 8-pin MSOP package for compact DC-DC conversion designs. From $1.20 in stock with worldwide shipping.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- MCP1602-ADJI/MS Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.9370(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 20 MHz switching frequency reduces external inductor and capacitor size, enabling sub-millimeter-height power stages for thin portable devices
- Dual PFM/PWM operation automatically switches to pulse frequency modulation at light loads, extending battery life in IoT and wearable applications
- Adjustable output voltage from 0.6 V to 5.5 V with voltage-mode control and 2.7 V to 5.5 V input range, covering 3.3 V and 5 V battery rails
Applications
The MCP1602-ADJI/MS is designed for battery-powered portable electronics including wearables, IoT sensors, and handheld devices that require a compact, high-frequency synchronous buck converter with adaptive power control. Its 20 MHz switching frequency allows use of tiny inductors and ceramic capacitors, minimizing total solution size for space-constrained designs. The automatic PFM mode at light load currents improves efficiency at standby and sleep states where quiescent current savings are critical.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | MSOP-8 |
| YTEOL | 9 |
| Additional Feature | IT CAN ALSO OPERATE WITH PULSE FREQUENCY MODULATION |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Control Mode | VOLTAGE-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 5.5V |
| Input Voltage-Min | 2.7V |
| Input Voltage-Nom | 3.6V |
| JESD-30 Code | S-PDSO-G8 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Output Current-Max | 0.5A |
| Output Voltage-Max | 4.5V |
| Output Voltage-Min | 0.8V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP8,.19 |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Screening Level | TS 16949 |
| Surface Mount | YES |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 2400kHz |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 40 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Thailand |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the 20 MHz switching frequency of the MCP1602-ADJI/MS affect passive component selection?
At 20 MHz, the MCP1602-ADJI/MS allows use of inductors as small as 470 nH and ceramic output capacitors of 1 µF to 4.7 µF, significantly reducing the total power stage footprint compared to conventional 1 MHz to 3 MHz switchers. This makes the MCP1602 well-suited for wearables and IoT modules where PCB area is limited to just a few square millimeters for the entire power section.
When does the MCP1602-ADJI/MS switch from PWM to PFM mode, and how much does it improve light-load efficiency?
The MCP1602-ADJI/MS automatically transitions from PWM to pulse frequency modulation when the load current drops below approximately 10 mA to 20 mA (device-threshold dependent). In PFM mode, switching losses are reduced by skipping unnecessary pulses, improving light-load efficiency from roughly 70% in fixed-PWM operation to over 85% at loads below 5 mA, extending battery runtime in IoT nodes that spend most of their time in sleep state.
What output voltage range can be configured on the MCP1602-ADJI/MS and what resistor values are needed for a 1.8 V output?
The MCP1602-ADJI/MS supports an adjustable output from 0.6 V to 5.5 V set by an external resistor divider from VOUT to the feedback pin. To set a 1.8 V output using the 0.6 V internal reference, use a feedback top resistor of approximately 200 kΩ and a bottom resistor of 100 kΩ, yielding VOUT = 0.6 V × (1 + 200k/100k) = 1.8 V. The 500 mA output current remains available across the full adjustment range.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.3900 | $1.39 |
| 100+ | $1.0600 | $106.00 |
| 1000+ | $1.0200 | $1020.00 |
| 5000+ | $0.9480 | $4740.00 |
| 7500+ | $0.9390 | $7042.50 |
| 10000+ | $0.9370 | $9370.00 |
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