DATA SHEET
TPS6102x 96% Efficient Synchronous Boost Converters
1 Features
- Qualified for Automotive Applications
- 96% Efficient Synchronous Boost Converter
- Output Voltage Remains Regulated When Input Voltage Exceeds Nominal Output Voltage
- Device Quiescent Current: 25 µA (Typ)
- Input Voltage Range: 0.9 V to 6.5 V
- Fixed and Adjustable Output Voltage Options Up to 5.5 V
- Power Save Mode for Improved Efficiency at Low Output Power
- Low Battery Comparator
- Low EMI-Converter (Integrated Anti-ringing Switch)
- Load Disconnect During Shutdown
- Over-Temperature Protection
- Small 3-mm × 3-mm QFN-10 Package
2 Applications
- All One-Cell, Two-Cell and Three-Cell Alkaline, NiCd or NiMH or Single-Cell Li Battery Powered Products
- Portable Audio Players
- PDAs
- Cellular Phones
- Personal Medical Products
- Camera White LED Flash Light
3 Description
The TPS6102x devices provide a power supply solution for products powered by either a one-cell, two-cell, or three-cell alkaline, NiCd or NiMH, or one-cell Li-Ion or Li-polymer battery. Output currents can go as high as 200 mA while using a single-cell alkaline, and discharge it down to 0.9 V. It can also be used for generating 5 V at 500 mA from a 3.3-V rail or a Li-Ion battery. The boost converter is based on a fixed frequency, pulse-width-modulation (PWM) controller using a synchronous rectifier to obtain maximum efficiency. At low load currents, the converter enters the Power Save Mode to maintain a high efficiency over a wide load current range. The Power Save Mode can be disabled, forcing the converter to operate at a fixed switching frequency. The maximum peak current in the boost switch is limited to a value of 800 mA, 1500 mA or 1800 mA depending on the device version.
The TPS6102x devices keep the output voltage regulated even when the input voltage exceeds the nominal output voltage. The output voltage can be programmed by an external resistor divider, or is fixed internally on the chip. The converter can be disabled to minimize battery drain. During shutdown, the load is completely disconnected from the battery. A low-EMI mode is implemented to reduce ringing and, in effect, lower radiated electromagnetic energy when the converter enters the discontinuous conduction mode. The device is packaged in a 10-pin VSON PowerPAD™ package.
Device Information(1)
| PART NUMBER | PACKAGE | BODY SIZE (NOM) |
|---|---|---|
| TPS61025-Q1 | VSON (10) | 3.00mm x 3.00mm |
| TPS61027-Q1 | ||
| TPS61029-Q1 |
- For all available packages, see the orderable addendum at the end of the datasheet.
4 Simplified Schematic
5 Revision History
Changes from * Revision (November 2009) to A Revision
- Added Device Information table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section Go
- Added ESD Ratings table Go
- Improved image quality for all equations and figures.Go
6 Device Comparison Table
| PART NUMBER (1) | OUTPUT VOLTAGE (DC/DC) | NOMINAL SWITCH CURRENT LIMIT |
|---|---|---|
| TPS61029-Q1 | Adjustable | 1800 mA |
| TPS61025-Q1(2) | 3.3 V | 1500 mA |
| TPS61027-Q1(2) | 5 V | 1500 mA |
(1) For all available packages, see the orderable addendum at the end of the datasheet
(2) Product preview. Contact TI factory for more information
7 Pin Configuration and Functions
VSON (DRC) (DPN)
10-Pin Package
TOP VIEW
Pin Functions
| PIN | I/O | DESCRIPTION | |
|---|---|---|---|
| NAME | NO. | ||
| EN | 1 | I | Enable input (1/VBAT enabled, 0/GND disabled) |
| FB | 3 | I | Voltage feedback of adjustable versions |
| GND | 5 | Control / logic ground | |
| LBI | 7 | I | Low battery comparator input (comparator enabled with EN), may not be left floating, should be connected to GND or VBAT if comparator is not used |
| LBO | 4 | O | Low battery comparator output (open drain) |
| PS | 8 | I | Enable/disable power save mode (1/VBAT disabled, 0/GND enabled) |
| SW | 9 | I | Boost and rectifying switch input |
| PGND | 10 | Power ground | |
| VBAT | 6 | I | Supply voltage |
| VOUT | 2 | O | Boost converter output |
| PowerPAD™ | Must be soldered to achieve appropriate power dissipation. Should be connected to PGND. | ||
8 Specifications
8.1 Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted) (1)| MIN | MAX | UNIT | ||
|---|---|---|---|---|
| Input voltage range | SW, VOUT, LBO, VBAT, PS, EN, FB, LBI | –0.3 | 7 | V |
| TJ | Operating virtual junction temperature range | –40 | 150 | °C |
| Tstg | Storage temperature range | –65 | 150 |
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
8.2 ESD Ratings
| VALUE | UNIT | ||||
|---|---|---|---|---|---|
| TPS61025-Q1, TPS61027-Q1, and TPS61029-Q1 in DRC package | |||||
| V(ESD) | Electrostatic discharge | Human-body model (HBM), per AEC Q100-002(1) | ±2000 | V | |
| Charged-device model (CDM), per AEC Q100-011 | All pins except EN, GND, VBAT, and PGND | ±500 | |||
| Corner pins (EN, GND, VBAT, and PGND) | ±750 | ||||
| TPS61029-Q1 in DPN package | |||||
| V(ESD) | Electrostatic discharge | Human-body model (HBM), per AEC Q100-002(1) | ±2000 | V | |
| Charged-device model (CDM), per AEC Q100-011 | All pins except EN, GND, VBAT, and PGND | ±500 | |||
| Corner pins (EN, GND, VBAT, and PGND) | ±750 | ||||
(1) AEC Q100-002 indicates that HBM stressing shall be in accordance with the ANSI/ESDA/JEDEC JS-001 specification.
8.3 Recommended Operating Conditions
| MIN | MAX | UNIT | |
|---|---|---|---|
| Supply voltage at VBAT, VI (TPS61025, TPS61027) | 0.9 | 6.5 | V |
| Supply voltage at VBAT, VI (TPS61029) | 0.9 | 5.5 | V |
| Operating virtual junction temperature range, TJ | –40 | 125 | °C |
8.4 Thermal Information
| THERMAL METRIC(1) | DRC | DPN | UNIT | |
|---|---|---|---|---|
| 10 PINS | 10 PINS | |||
| RθJA | Junction-to-ambient thermal resistance | 47.2 | 47.9 | °C/W |
| RθJC(top) | Junction-to-case (top) thermal resistance | 67.5 | 58.3 | |
| RθJB | Junction-to-board thermal resistance | 21.6 | 22.4 | |
| ψJT | Junction-to-top characterization parameter | 1.7 | 0.9 | |
| ψJB | Junction-to-board characterization parameter | 21.8 | 22.5 | |
| RθJC(bot) | Junction-to-case (bottom) thermal resistance | 3.6 | 4.5 | |
(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.
8.5 Electrical Characteristics
Over recommended junction temperature range with TA = TJ = –40°C to 125°C and over recommended input voltage range ,(typical at an ambient temperature range of 25°C) (unless otherwise noted)| PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT | ||
|---|---|---|---|---|---|---|---|
| DC/DC STAGE | |||||||
| VI | Minimum input voltage for start-up | RL = 120 Ω | 0.9 | 1.2 | V | ||
| Input voltage range, after start-up (TPS61025, TPS61027) |
0.9 | 6.5 | V | ||||
| Input voltage range, after start-up (TPS61029) | 0.9 | 5.5 | V | ||||
| VO | Output voltage range (TPS61029) | 1.8 | 5.5 | V | |||
| VFB | Feedback voltage (TPS61025, TPS61027) | 490 | 500 | 510 | mV | ||
| f | Oscillator frequency | 480 | 600 | 720 | kHz | ||
| ISW | Switch current limit (TPS61025, TPS61027) | VOUT = 3.3 V | 1200 | 1500 | 1800 | mA | |
| ISW | Switch current limit (TPS61029) | VOUT = 3.3 V | 1500 | 1800 | 2100 | mA | |
| Start-up current limit | 0.4 x ISW | mA | |||||
| SWN switch on resistance | VOUT = 3.3 V | 260 | mΩ | ||||
| SWP switch on resistance | VOUT = 3.3 V | 290 | mΩ | ||||
| Total accuracy (including line and load regulation) | ±3% | ||||||
| Line regulation | 0.6% | ||||||
| Load regulation | 0.6% | ||||||
| Quiescent current | VBAT | IO = 0 mA, VEN = VBAT = 1.2 V, VOUT = 3.3 V, TA = 25°C |
1 | 3 | µA | ||
| VOUT | 25 | 45 | µA | ||||
| Shutdown current | VEN = 0 V, VBAT = 1.2 V, TA = 25°C |
0.1 | 1 | µA | |||
| CONTROL STAGE | |||||||
| VUVLO | Undervoltage lockout threshold | VLBI voltage decreasing | 0.8 | V | |||
| VIL | LBI voltage threshold | VLBI voltage decreasing | 490 | 500 | 510 | mV | |
| LBI input hysteresis | 10 | mV | |||||
| LBI input current | EN = VBAT or GND | 0.01 | 0.1 | µA | |||
| VOL | LBO output low voltage | VO = 3.3 V, IOI = 100 µA | 0.04 | 0.4 | V | ||
| Vlkg | LBO output leakage current | VLBO = 7 V | 0.01 | 0.1 | µA | ||
| VIL | EN, PS input low voltage | 0.2 × VBAT | V | ||||
| VIH | EN, PS input high voltage | 0.8 × VBAT | V | ||||
| EN, PS input current | Clamped on GND or VBAT | 0.01 | 0.1 | µA | |||
| Overtemperature protection | 140 | °C | |||||
| Overtemperature hysteresis | 20 | °C | |||||
9 Typical Characteristics
Table of Graphs
| FIGURE | ||
|---|---|---|
| Maximum output current | vs Input voltage | Figure 1 |
| Efficiency | vs Output current (TPS61025) | Figure 2 |
| vs Output current (TPS61027) | Figure 3 | |
| vs Input voltage (TPS61025) | Figure 4 | |
| vs Input voltage (TPS61027) | Figure 5 | |
| Output voltage | vs Output current (TPS61025) | Figure 6 |
| vs Output current (TPS61027) | Figure 7 | |
| No load supply current into VBAT | vs Input voltage | Figure 8 |
| No load supply current into VOUT | vs Input voltage | Figure 9 |
Figure 1. Maximum Output Current vs Input Voltage
Figure 3. TPS61027 Efficiency vs Output Current
Figure 2. TPS61025 Efficiency vs Output Current
Figure 4. TPS61025 Efficiency vs Input Voltage
Figure 5. TPS61027 Efficiency vs Input Voltage
Figure 7. TPS61027 Output Voltage vs Output Current
Figure 9. No Load Supply Current Into VOUT vs Input Voltage
Figure 6. TPS61025 Output Voltage vs Output Current
Figure 8. No Load Supply Current Into VBAT vs Input Voltage
