LTC3419

Features: High Effi ciency Dual Step-Down Outputs: Up to 96% 600mA Current per Channel at VIN = 3V Only 35A Quiescent Current During Operation (Both Channels) 2.25MHz Constant-Frequency Operation 2.5V to 5.5V Input Voltage Range Low Dropout Operation: 100% Duty Cycle No Schottky Diodes Required ...

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SeekIC No. : 004402232 Detail

LTC3419: Features: High Effi ciency Dual Step-Down Outputs: Up to 96% 600mA Current per Channel at VIN = 3V Only 35A Quiescent Current During Operation (Both Channels) 2.25MHz Constant-Frequency Operation ...

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Part Number:
LTC3419
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/12/21

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Product Details

Description



Features:

High Effi ciency Dual Step-Down Outputs: Up to 96%
600mA Current per Channel at VIN = 3V
Only 35A Quiescent Current During Operation (Both Channels)
2.25MHz Constant-Frequency Operation
2.5V to 5.5V Input Voltage Range
Low Dropout Operation: 100% Duty Cycle
No Schottky Diodes Required
Internally Compensated for All Ceramic Capacitors
Independent Internal Soft-Start for Each Channel
Available in Fixed Output Versions
Current Mode Operation for Excellent Line and Load Transient Response
0.6V Reference Allows Low Output Voltages
User-Selectable Burst Mode® Operation
Short-Circuit Protected
Ultralow Shutdown Current: IQ < 1A
Available in Small MSOP or 3mm * 3mm DFN-8 Packages



Application

Cellular Telephones
Digital Still Cameras
Wireless and DSL Modems
Portable Media Players
PDAs/Palmtop PCs



Pinout

  Connection Diagram


Specifications

Input Supply Voltage (VIN) ...........................0.3 to 6V
VFB1, VFB2 ......................................0.3V to VIN + 0.3V
RUN1, RUN2, MODE ........................0.3V to VIN + 0.3V
SW1, SW2 ......................................0.3V to VIN + 0.3V
P-Channel SW Source Current (DC) (Note 2) ......800mA
N-Channel SW Source Current (DC) (Note 2) ......800mA
Peak SW Source and Sink Current (Note 2) ............1.3A
Operating Temperature Range (Note 3) ...40 to 85°C
Junction Temperature (Note 6) ........................... 125°C
Storage Temperature Range ............. 65°C to 125°C
Lead Temperature (Soldering, 10 sec)
MSOP Package .................................................    300°C



Description

The LTC®3419 is a dual, 2.25MHz, constant-frequency, synchronous step-down DC/DC converter in a tiny 3mm * 3mm DFN package. 100% duty cycle provides low dropout operation, extending battery life in portable systems. Low output voltages are supported with the 0.6V feedback reference voltage. Each regulator can supply 600mA output current.

The input voltage range of LTC3419 is 2.5V to 5.5V, making it ideal for Li-Ion and USB powered applications. Supply current during operation is only 35A and drops to <1A in shutdown. A user-selectable mode input allows the user to trade off between high effi ciency Burst Mode operation and pulse-skipping mode.

An internally set 2.25MHz switching frequency allows the use of tiny surface mount inductors and capacitors. Internal soft-start reduces inrush current during start-up. Both outputs are internally compensated to work with ceramic output capacitors. The LTC3419 is available in a low profi le (0.75mm) 3mm * 3mm DFN package. The LTC3419 is also available in a fi xed output voltage confi guration selected via internal resistor dividers (see Table 2).




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