LTC3836 - Dual 2-Phase, No RSENSE Low VIN Synchronous Controller

The operating frequency is selectable from 300kHz to 750kHz, allowing the use of small surface mount inductors and capacitors. For noise sensitive applications, the LTC3836 operating frequency can be externally synchronized from 250kHz to 850kHz.

The LTC3836 features an internal 1ms soft-start that can be extended with an external capacitor. A tracking input allows the second output to track the first during start-up.

The LTC3836 is available in the tiny thermally enhanced (4mm × 5mm) QFN and 28-lead narrow SSOP packages.

Features

No Current Sense Resistors Required
Out-of-Phase Controllers Reduce Required Input Capacitance
All N-Channel Synchronous Drive
VIN Range: 2.75V to 4.5V
Constant-Frequency Current Mode Operation
0.6V ±1.5% Voltage Reference
Low Dropout Operation: 97% Duty Cycle
True PLL for Frequency Locking or Adjustment
Selectable Pulse-Skipping/Continuous Operation
Tracking Function
Internal Soft-Start Circuitry
Power Good Output Voltage Monitor
Output Overvoltage Protection
Micropower Shutdown: IQ = 6.5µA
Tiny Low Profile (4mm × 5mm) QFN and Narrow SSOP Packages

Typical Application

Applications

General Purpose 3.3V to 1.X Supplies
Single Lithium-Ion Powered Devices
Distributed DC Power Systems

Packaging

Order Information

Part Number	Package	Temp	Price(1-99)	Price (1k)*
LTC3836EGN#PBF	SSOP-28	E	$4.24	$2.75
LTC3836EGN#TRPBF	SSOP-28	E		$2.80
LTC3836EUFD#PBF	4x5 QFN-28	E	$4.24	$2.75
LTC3836EUFD#TRPBF	4x5 QFN-28	E		$2.80

Demo Boards

Part Number	Description	Price
DC1081A	LTC3836EUFD Demo Board \| 2-Phase, 2.75V to 4.5V Input, VOUT1 = 1.8V @ 12A, VOUT2 = 1.2V @ 12A	Contact Factory
DC1107A	LTC3836EUFD Demo Board \| 2-Phase, 2.75V to 4.5V Input, VOUT1 = 1.8V @ 7A, VOUT2 = 1.2V @ 7A	Contact Factory