LTC3035 - 300mA VLDO Linear Regulator with Charge Pump Bias Generator

Features

• Wide Input Voltage Range: 1.7V to 5.5V
• Wide Adjustable Output Voltage Range: 0.4V to 3.6V
• Built-In Charge Pump Generates High Side Bias
• Very Low Dropout: 45mV at 300mA
• ± 2% Voltage Accuracy Over Temperature, Supply, Load
• Fast Transient Recovery
• Low Operating Current: IIN = 100μA Typ
• Low Shutdown Current: IIN = 1μA Typ
• Stable with Ceramic Capacitor Down to 1μF
• Output Current Limit
• Thermal Overload Protected
• Reverse Output Current Protected
• Available in 8-Lead (3mm × 2mm)
  DFN Package

Typical Application

Description

The LTC3035 is a micropower, VLDO (very low dropout) linear regulator which operates from input voltages as low as 1.7V. The device is capable of supplying 300mA of output current with a typical dropout voltage of only 45mV. To allow operation at low input voltages the LTC3035 includes a charge pump generator that provides the necessary bias voltage for the internal LDO circuitry. Output current comes directly from the input supply for high efficiency regulation. The charge pump bias generator requires only a 0.1μF flying capacitor and a 1μF bypass capacitor for operation. The low 0.4V internal reference voltage allows the LTC3035 to be programmed to much lower output voltages than commonly available in LDOs. The output voltage is programmed via two tiny SMD resistors. The LTC3035’s low quiescent current makes it an ideal choice for use in battery-powered systems.

Other features include high output voltage accuracy, excellent transient response, stability with ultralow ESR ceramic capacitors as small as 1μF, short-circuit and thermal overload protection, output current limiting and reverse output current protection. The LTC3035 is available in a tiny, low profile (3mm × 2mm × 0.75mm) 8-lead DFN package.

Packaging

DFN-8

Order Info

• Part numbers ending in PBF are lead free. Please contact LTC marketing for information on lead based finish parts.
• Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
• Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number	Package	Pins	Temp	Price (1-99)	Price (1k)*	RoHS Data
LTC3035EDDB	DFN	8	E	$1.92	$1.29	View
LTC3035EDDB#PBF	DFN	8	E	$1.92		View
LTC3035EDDB#TR	DFN	8	E	$1.92	$1.35	View
LTC3035EDDB#TRM	DFN	8	E	$1.92	$1.37	View
LTC3035EDDB#TRMPBF	DFN	8	E	$1.92	$1.37	View
LTC3035EDDB#TRPBF	DFN	8	E	$1.92	$1.35	View
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^* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Applications

• Li-Ion to 3.3V Low Dropout Supplies
• 2 × AA to 1.8V Low Dropout Supplies
• Low Power Handheld Devices
• Low Voltage Logic Supplies
• DSP Power Supplies
• Cellular Phones
• Portable Electronic Equipment
• Handheld Medical Instruments
• Post Regulator for Switching Supply Noise Rejection

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