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Full machine-readable index: https://core-electronics.com.au/llms.txt # Pololu 5V Step-Up Voltage Regulator U1V10F5 **Type:** Product page · **SKU:** POLOLU-2564 · **Brand:** [Pololu](https://core-electronics.com.au/brands/pololu-australia) **Page:** https://core-electronics.com.au/pololu-5v-step-up-voltage-regulator-u1v10f5.html ([markdown](https://core-electronics.com.au/pololu-5v-step-up-voltage-regulator-u1v10f5.html.md)) This tiny (0.35″×0.45″) U1V10F5 switching step-up (or boost) voltage regulator efficiently generates 5 V from input voltages as low as 0.5 V. Unlike most boost regulators, the U1V10F5 automatically switches to a linear down-regulation mode when the input voltage exceeds the output. The pins have a 0.1″ spacing, making this board compatible with standard solderless breadboards and perfboards. ## Pricing - **Price:** $11.55 (inc GST) — $10.50 AUD, exc GST - **Quantity discounts:** 10+ $10.08 (exc GST) · 25+ $9.76 (exc GST) ## Availability & dispatch - In stock, ships same business day if ordered before 2PM (Australia/Sydney). - We can dispatch 13 today, and up to 160 more in 4–7 days. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=POLOLU-2564:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart. - **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/POLOLU-2564:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.) - **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there. - **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works) - **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt ## Description | [![](https://core-electronics.com.au/attachments/localcontent/0J4682_17467ada6e7.jpg)](https://core-electronics.com.au/attachments/localcontent/0J4682_298445fd20e.jpg) | |---| This 5 V boost (step-up) voltage regulator generates higher output voltages from input voltages as low as 0.5 V, and it also automatically switches to a linear down-regulation mode when the input voltage exceeds the output. This makes it great for powering 5 V electronics projects from 1 to 3 NiMH, NiCd, or alkaline cells or from a single lithium-ion cell. When boosting, this module acts as a switching regulator (also called switched-mode power supplies (SMPS) or DC-to-DC converters) and has a typical efficiency between 70% to 90%. The available output current is a function of the input voltage, output voltage, and efficiency (see *Typical Efficiency and Output Current* section below), but the input current can typically be as high as 1.2 A. This regulator is also available with a [fixed 3.3 V output](https://core-electronics.com.au/pololu-3-3v-step-up-voltage-regulator-u1v10f3.html), and very similar [3.3V](https://core-electronics.com.au/pololu-3-3v-step-up-voltage-regulator-u1v11f3.html), [5V](https://core-electronics.com.au/pololu-5v-step-up-voltage-regulator-u1v11f5.html), and [adjustable-output](https://core-electronics.com.au/pololu-adjustable-step-up-voltage-regulator-u1v11a.html) versions are available with a true shutdown option that turns off power to the load. The regulator’s thermal shutdown engages at around 140°C and helps prevent damage from overheating, but it does **not** have reverse-voltage protection. | [![](https://core-electronics.com.au/attachments/localcontent/0J4683_21914fc930f.jpg)](https://core-electronics.com.au/attachments/localcontent/0J4683_28694912cdc.jpg) | |---| **Features** - Input voltage: 0.5 V to 5.5 V - Fixed 5 V output with 4% accuracy - Automatic linear down-regulation when the input voltage is greater than the output voltage - 1.2 A switch allows for input currents up to 1.2 A - Good efficiency at light load: <1 mA typical no-load quiescent current, though it can exceed 1 mA for very low input voltages - Integrated over-temperature shutoff - Small size: 0.35" × 0.45"; × 0.1" (9 × 11.5 × 2.5 mm) **Using the Regulator** **Connections** The boost regulator has three connections: input voltage (VIN), ground (GND), and output voltage (VOUT). The input voltage, VIN, must be at least 0.5 V for the regulator to turn on. However, once the regulator is on, the input voltage can drop as low as 0.3 V and the 5 V output voltage will be maintained on VOUT. Unlike standard boost regulators, this regulator has an additional linear down-regulation mode that allows it to convert input voltages as high as 5.5 V down to 5 V for small to moderate sized loads. When the input voltage exceeds 5 V, the regulator automatically switches to this down-regulation mode. The input voltage should not exceed 5.5 V. Please be wary of destructive LC spikes that might cause the input voltage to surpass 5.5 V (see below for more information). The three connections are labeled on the back side of the PCB, and they are arranged with a 0.1" spacing along the edge of the board for compatibility with solderless [breadboards](https://core-electronics.com.au/prototyping/breadboards.html), [connectors](https://core-electronics.com.au/connectors-sockets.html), and other prototyping arrangements that use a 0.1" grid. You can solder wires directly to the board or solder in either the 3×1 [straight male header strip](https://core-electronics.com.au/0-100-2-54-mm-breakaway-male-header-1x40-pin-straight.html) or the 3×1 [right-angle male header strip](https://core-electronics.com.au/0-100-2-54-mm-breakaway-male-header-1x40-pin-right-angle.html) that is included. | [![](https://core-electronics.com.au/attachments/localcontent/0J4681_18184e88397.jpg)](https://core-electronics.com.au/attachments/localcontent/0J4681_16871d3d5c2.jpg) | |---| **Typical Efficiency and Output Current** The efficiency of a voltage regulator, defined as (Power out)/(Power in), is an important measure of its performance, especially when battery life or heat are concerns. As shown in the graphs below, this switching regulator typically has an efficiency of 70 to 90%. | [![](https://core-electronics.com.au/attachments/localcontent/0J4685_360951ca15a.jpg)](https://core-electronics.com.au/attachments/localcontent/0J4685_8460a2d5b6.png) | |---| The maximum achievable output current is approximately proportional to the ratio of the input voltage to the output voltage. If the *input* current exceeds the switch current limit (typically somewhere between 1.2 and 1.5 A), the output voltage will begin to drop. Additionally, the maximum output current can depend on other factors, including the ambient temperature, air flow, and heat sinking. **LC Voltage Spikes** When connecting voltage to electronic circuits, the initial rush of current can cause damaging voltage spikes that are much higher than the input voltage. In Pololu's tests with typical power leads (~30" test clips), input voltages above 4.5 V caused voltage spikes that could potentially damage the regulator. You can suppress such spikes by soldering a 33 µF or larger electrolytic capacitor close to the regulator between VIN and GND. More information about LC spikes can be found in Pololu's application note, Understanding Destructive LC Voltage Spikes. **People often buy this product together with:** | [![Pololu 5V Step-Up Voltage Regulator U1V11F5](https://core-electronics.com.au/attachments/localcontent/0J4611_5081aa4c17.jpg)](https://core-electronics.com.au/pololu-5v-step-up-voltage-regulator-u1v11f5.html) | [Pololu 5V Step-Up Voltage Regulator U1V11F5](https://core-electronics.com.au/pololu-5v-step-up-voltage-regulator-u1v11f5.html) | |---|---| | [![Pololu 3.3V Step-Up Voltage Regulator U1V10F3](https://core-electronics.com.au/attachments/localcontent/0J4678_4863832a8c.jpg)](https://core-electronics.com.au/pololu-3-3v-step-up-voltage-regulator-u1v10f3.html) | [Pololu 3.3V Step-Up Voltage Regulator U1V10F3](https://core-electronics.com.au/pololu-3-3v-step-up-voltage-regulator-u1v10f3.html) | |---|---| **Dimensions** | Size: | 0.35" × 0.45" × 0.1"[1](https://core-electronics.com.au/#note1) | |---|---| | Weight: | 0.4 g[1](https://core-electronics.com.au/#note1) | **General specifications** | Minimum operating voltage: | 0.5 V | |---|---| | Maximum operating voltage: | 5.5 V | | Maximum input current: | 1.2 A[2](https://core-electronics.com.au/#note2) | | Output voltage: | 5 V | | Reverse voltage protection?: | N | | Maximum quiescent current: | 1 mA[3](https://core-electronics.com.au/#note3) | **Identifying markings** | PCB dev codes: | reg12b | |---|---| | Other PCB markings: | 0J7517 | **Notes:** 1Without included optional headers.2Regulator may overheat at lower input currents when VIN is much lower than VOUT. Available output current is a function of VIN, VOUT, and the regulator efficiency.3The highest quiescent currents occur at very low input voltages; for most of the input voltage range, the quiescent current is well below 1 mA. **File downloads** - **Pololu Step-Up Voltage Regulator U1V10Fx schematic diagram (148k pdf)** Printable schematic diagram for the U1V10Fx family of Pololu step-up voltage regulators: U1V10F3 and U1V10F5. - **Dimension diagram of the U1V10Fx Step-Up Voltage Regulator (139k pdf)** - **3D model of the U1V10Fx Step-Up Voltage Regulator (3MB step)** - **Pololu Step-Up Voltage Regulator U1V10Fx drill guide (17k dxf)** This DXF drawing shows the locations of all of the board’s holes. **Recommended links** - **[Texas Instruments TPS61200/TPS61201/TPS61202 regulator datasheet](https://core-electronics.com.au/attachments/localcontent/tps61200_193680627bc.pdf)** ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/p/o/pololu_5v_step_up_voltage_regulator_u1v10f5__pololu_2564__00.jpg)