TPS61088

Part: TPS61088 — Texas Instruments

Type: Fully-Integrated Synchronous Boost Converter

Description: The TPS61088 is a high-power density, fully-integrated synchronous boost converter with a 2.7–12 V input, 4.5–12.6 V output, 10-A switch current capability, and up to 91% efficiency.

Operating Conditions:

• Supply voltage: 2.7–12 V
• Operating temperature: -40 to 125 °C
• Output voltage range: 4.5–12.6 V
• Inductance: 0.47–10 μH

Absolute Maximum Ratings:

• Max supply voltage (VIN, SW, FSW, VOUT): 14.5 V
• Max junction temperature: 150 °C
• Max storage temperature: 150 °C

Key Specs:

• Input voltage range (VIN): 2.7–12 V
• Output voltage range (VOUT): 4.5–12.6 V
• High-side MOSFET on-resistance: 13 mΩ (typ)
• Low-side MOSFET on-resistance: 11 mΩ (typ)
• Peak switch current limit in PFM mode: 11.9 A (typ)
• Peak switch current limit in FPWM mode: 10.3 A (typ)
• Switching frequency (ƒSW): 500 kHz (typ, R FREQ = 301 kΩ)
• Output overvoltage protection threshold (V OVP): 13.2 V (typ)
• Shutdown current into the VIN pin (I SD): 1 μA (typ)

Features:

• 10-A switch current
• Up to 91% efficiency
• Mode selection between PFM mode and forced PWM mode at light load
• 1.0-μA current into the VIN pin during shutdown
• Resistor-programmable switch peak current limit
• Adjustable switching frequency: 200 kHz to 2.2 MHz
• Programmable soft start
• Output overvoltage protection at 13.2 V
• Cycle-by-cycle overcurrent protection
• Thermal shutdown

Applications:

• Portable POS terminal
• Bluetooth speaker
• E-cigarette
• Thunderbolt interface
• Quick charge power bank

Package:

• VQFN (20) 4.50 mm × 3.50 mm

• 2.7-V to 12-V input voltage range
• 4.5-V to 12.6-V output voltage range
• 10-A switch current
• Up to 91% efficiency at V IN = 3.3 V, V OUT = 9 V, and I OUT = 3 A
• Mode selection between PFM mode and forced PWM mode at light load
• 1.0-μA current into the VIN pin during shutdown
• Resistor-programmable switch peak current limit
• Adjustable switching frequency: 200 kHz to 2.2 MHz
• Programmable soft start
• Output overvoltage protection at 13.2 V
• Cycle-by-cycle overcurrent protection
• Thermal shutdown
• 4.50-mm × 3.50-mm 20-pin VQFN package
• Create a custom design using the TPS61088 with the WEBENCH Power Designer

• Portable POS terminal
• Bluetooth ™ speaker
• E-cigarette
• Thunderbolt interface
• Quick charge power bank

Figure 5-1. 20-Pin VQFN With Thermal Pad RHL Package(Top View)

Table 5-1. Pin Functions

Minimum and maximum values are at VIN = 2.7 V to 5.5 V and TJ = -40°C to 125°C. Typical values are at VIN = 3.6 V and TJ = 25°C

over operating free-air temperature (unless otherwise noted) (1)

over operating free-air temperature range (unless otherwise noted)

The TPS61088 is designed for outputting voltage up to 12.6 V with 10-A switch current capability to deliver more than 30-W power. The TPS61088 operates at a quasi-constant frequency pulse-width modulation (PWM) in moderate-to-heavy load condition. In light load condition, the converter can either operate in PFM mode or in forced PWM mode according to the mode selection. The PFM mode brings high efficiency over entire load range, but PWM mode can avoid the acoustic noise as the switching frequency is fixed. The converter uses the adaptive constant off-time peak current control scheme, which provides excellent transient line and load response with minimal output capacitance. The TPS61088 can work with different inductor and output capacitor combination by external loop compensation. It also supports adjustable switching frequency ranging from 200 kHz to 2.2 MHz.