AP5726
(Top View)
White LED Step-Up DC/DC ConverterThe AP5726 is a white led step-up dc/dc converter from Diodes Incorporated. (Top View). View the full AP5726 datasheet below including electrical characteristics, absolute maximum ratings.
Manufacturer
Diodes Incorporated
Category
White LED Step-Up DC/DC Converter
Overview
Part: AP5726 from Diodes Incorporated
Type: White LED Step-Up DC/DC Converter
Description: Step-up DC/DC converter designed to drive 2-6 white LEDs in series from a Li-Ion cell, featuring 1.2MHz switching frequency, 0.31V feedback voltage, and 84% typical efficiency.
Operating Conditions:
- Supply voltage: 2.7–5.5 V
- Operating temperature: -40 to 125 °C (Junction)
- Switching frequency: 1.0–1.4 MHz
Absolute Maximum Ratings:
- Max supply voltage: 7 V (VIN Pin)
- Max switching voltage: 34 V (SW Pin)
- Max junction temperature: 150 °C
- Max storage temperature: -65 to +150 °C
Key Specs:
- Operating Input Voltage (VIN): 2.7–5.5 V
- Operating Frequency (FOSC): 1.2 MHz (Typ.)
- Feedback Voltage (VFB): 0.31 V (Typ.)
- On Resistance of MOSFET (Rds(on)): 0.95 Ω (Typ.)
- Switching Current Limit (IOCP): 750 mA (Typ.)
- OVP Threshold (VOVP): 30 V (Typ., SOT26)
- Efficiency: 84% (Typ.)
- Quiescent Current (IQ): 500 μA (Typ., FB=0.41V, No Switching)
Features:
- High efficiency: 84% typical
- Fast 1.2MHz switching frequency
- Current limit and UVLO protections
- Internal Thermal Shutdown
- Internal Over Voltage Protection
- Integrated soft-start function
- Available in "Green" Molding Compound
- Lead Free Finish/ RoHS Compliant
Applications:
- Cellular Phones
- PDAs, Hand help Computers
- Digital Cameras
- MP3 Players
- GPS Receivers
Package:
- SOT26
- TSOT23-6
- DFN2020C-6
Features
- High efficiency: 84% typical
- Fast 1.2MHz switching frequency
- Current limit and UVLO protections
- Internal Thermal Shutdown
- Internal Over Voltage Protection
- Integrated soft-start function
- SOT26, TSOT23-6 and DFN2020C-6: Available in "Green" Molding Compound (No Br, Sb)
- Lead Free Finish/ RoHS Compliant (Note 1)
Applications
- Cellular Phones
- PDAs, Hand help Computers
- Digital Cameras
- MP3 Players
- GPS Receivers
Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead\_free.html.
Pin Configuration
Electrical Characteristics
| Symbol | Parameter | Conditions | Min | Typ. | Max | Unit |
|---|---|---|---|---|---|---|
| System Supply Input | ||||||
| VIN | Operating Input Voltage | 2.7 | - | 5.5 | V | |
| UVLO | Under Voltage Lockout | - | 2.2 | 2.4 | V | |
| Under Voltage Lockout Hysteresis | - | 85 | - | mV | ||
| IQ | Quiescent Current | FB=0.41V, No Switching | - | 500 | - | μA |
| ISD | Shutdown Current | VEN < 0.4V | - | 0.1 | 1 | μA |
| Oscillator | ||||||
| FOSC | Operation Frequency | 1 | 1.2 | 1.4 | MHz | |
| Dmax | Maximum Duty Cycle | 86 | 90 | - | % | |
| Reference Voltage | ||||||
| VFB | Feedback Voltage | 0.279 | 0.31 | 0.341 | V | |
| IFB | FB Pin Bias Current | 10 | 45 | 100 | nA | |
| MOSFET | ||||||
| Rds(on) | On Resistance of MOSFET | - | 0.95 | 1.2 | Ω | |
| IOCP | Switching Current Limit Control and Protection | Normal Operation | - | 750 | - | mA |
| EN | Voltage High | ON | 1.5 | - | - | V |
| EN | Voltage Low | OFF | - | - | 0.4 | V |
| IEN | EN Pin Pull Low Current | - | 4 | 6 | μA | |
| OVP | OVP Threshold | SOT26 (Note 2) | 26 | 30 162 | 34 | V |
| θJA | Thermal Resistance Junction-to Ambient | TSOT23-6 (Note 2) DFN2020C-6 (Note 2) SOT26 (Note 2) | 152 200 36 | o C/W | ||
| θJC | Thermal Resistance Junction-to Case | TSOT23-6 (Note 2) DFN2020C-6 (Note 2) | 32 30 | o C/W |
Absolute Maximum Ratings
| Symbol | Parameter | Rating | Unit |
|---|---|---|---|
| VIN | VIN Pin Voltage | -0.3~7 | V |
| VSW | SW Voltage | -0.3~34 | V |
| VOVP | OVP Pin Voltage | -0.3~35 | V |
| VFB | Feedback Pin Voltage | -0.3~7 | V |
| EN | EN | -0.3~7 | V |
| TJ(MAX) | Maximum Junction Temperature | 150 | o C |
| TLEAD | Lead Temperature | 300 | o C |
| TST | Storage Temperature Range | -65 to +150 | o C |
Caution: Operation above the absolute maximum ratings can cause device failure. These values, therefore, must not be exceeded under any condition. Operation at the absolute maximum rating for extended periods, may reduce device reliability.
Recommended Operating Conditions
| Symbol | Parameter | Min | Max | Unit |
|---|---|---|---|---|
| VIN | Input Voltage | 2.7 | 5.5 | V |
| TJ | Operating Junction Temperature | -40 | 125 | o C |
| TA | Operating Ambient Temperature | -40 | 85 | o C |
Typical Application
Figure 1. Typical Application Circuit
July 2010 © Diodes Incorporated
Package Information
(1) Package Type: SOT26
(2) Package Type: TSOT23-6
Related Variants
The following components are covered by the same datasheet.
| Part Number | Manufacturer | Package |
|---|---|---|
| AP5726FDCG-7 | Diodes Incorporated | DFN2020C-6 |
| AP5726WG-7 | Diodes Incorporated | SOT26 |
| AP5726WUG-7 | Diodes Incorporated | TSOT23-6 |
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