TPS629206

Part: TPS629210 — Texas Instruments

Type: Synchronous Step-Down DC-DC Converter

Description: 3-V to 17-V input, 1-A synchronous buck converter with 4-μA quiescent current and DCS-Control topology in a SOT-583 package.

Operating Conditions:

• Supply voltage: 3.0 to 17 V
• Operating temperature: -40 to 125 °C (junction temperature)
• Output voltage range: 0.4 to 5.5 V
• Output current: 0 to 1 A

Absolute Maximum Ratings:

• Max supply voltage: 18 V (VIN, EN, PG, MODE/S-CONF)
• Max junction/storage temperature: -65 to 150 °C (storage temperature)

Key Specs:

• Quiescent current (power save mode): 4 μA (typical, IOUT = 0 mA, device not switching)
• High-side switch on-resistance: 250 mΩ (typical)
• Low-side switch on-resistance: 85 mΩ (typical)
• High-side FET current limit: 1.5 A (min), 1.8 A (typ), 2.1 A (max)
• Feedback voltage regulation accuracy: ±0.75% (0 °C ≤ TJ ≤ 85 °C)
• Undervoltage lockout threshold: 2.85 V (min), 2.95 V (typ), 3.0 V (max) (VIN rising)
• Selectable switching frequency: 1.0 MHz or 2.5 MHz (FPWM mode)
• Shutdown supply current: 0.25 μA (typical), 1.5 μA (max) at EN = 0 V

Features:

• DCS-Control topology with fast transient response
• Flexible MODE/S-CONF pin for frequency, mode, and output discharge selection
• Configurable output voltage: external divider (0.6 V to 5.5 V) or 18 internal VSET options (0.4 V to 5.5 V)
• Forced PWM or automatic power save (PFM) mode
• 100% duty cycle operation
• Open-drain power-good output
• Pin-to-pin compatible with TPS629210E, TPS629206, and TPS629203

Applications:

• Appliances
• Building automation
• Factory automation and control
• Grid infrastructure
• Retail automation & payment
• Wireless infrastructure

Package:

• SOT-583 (8-pin, 1.60 mm × 2.10 mm body size)

• High-efficiency DCS-Control ™ topology
• 4-μA typical low quiescent current
• Output current up to 1 A
• RDSON: 250-mΩ high side, 85-mΩ low side
• Output voltage accuracy of ±1%
• Configurable output voltage options:
• -VFB external divider: 0.6 V to 5.5 V
• -VSET internal divider:
• 18 options between 0.4 V and 5.5 V
• Flexibility through MODE/S-CONF pin
• -2.5-MHz or 1.0-MHz switching frequency
• -Forced PWM or auto (PFM) power save mode with dynamic mode change option
• -Output discharge on/off
• No external bootstrap capacitor required
• Output overcurrent and overtemperature protection
• 100% duty cycle mode
• Precise enable input
• Power-good output
• Pin-to-pin compatible with the TPS629210E, TPS629206, and TPS629203 devices
• 0.5-mm pitch, 8-pin SOT-583 package

• Appliances
• Building automation
• Factory automation and control
• Grid infrastructure
• Retail automation & payment
• Wireless infrastructure

Figure 6-1. TPS629210 Pinout

Table 6-1. Pin Functions

VI = 3 V to 17 V, T J = -40°C to +125°C, Typical values at VI = 12 V and T A = 25 °C, unless otherwise noted

over operating temperature range (unless otherwise noted) (1)

• (2) All voltage values are with respect to network ground terminal.

(3) While switching

Over operating junction temperature range (unless otherwise noted)

• (3) Not recommended for 1-MHz operation

(4) Larger values of inductance can be used to reduce the ripple current, but they can have a negative impact on efficiency and the overall transient response.

(5) Operating lifetime is derated at junction temperatures greater than 150°C.

The TPS629210 device is a highly-efficient, small, and highly-flexible synchronous step-down DC-DC converter that is easy to use. A wide input voltage range of 3 V to 17 V supports a wide variety of inputs like 12-V supply rails, single-cell or multi-cell Li-Ion, and 5-V or 3.3-V rails.