Position: Home  > All Categories> Integrated Circuits (ICs) > LTC3445

LTC3445

Features: ·High Efficiency: Up to 93%·600mA Output Current (VCC1 = 3V, VOUT = 1.3V)·Programmable Output Voltage: 0.85V to 1.55V·2.5V to 5.5V Input Voltage Range·1.5MHz Constant Frequency or Spread Spectrum Option·Soft-Start LDOs·Two LDO Regulators: 0.3V Dropout at 50mA PowerPath Controller·Dynamic...

product image

LTC3445 Picture
See larger image
SeekIC No. : 004402247 Detail

LTC3445: Features: ·High Efficiency: Up to 93%·600mA Output Current (VCC1 = 3V, VOUT = 1.3V)·Programmable Output Voltage: 0.85V to 1.55V·2.5V to 5.5V Input Voltage Range·1.5MHz Constant Frequency or Spread S...

LTC3445 Data Sheet

floor Price/Ceiling Price

Get Latest Price
Part Number:
LTC3445
Supply Ability:
5000

Price Break

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

SeekIC Buyer Protection PLUS - newly updated for 2013!

  • Escrow Protection.
  • Guaranteed refunds.
  • Secure payments.
  • Learn more >>

Month Sales

268 Transactions

Rating

evaluate  (4.8 stars)

Upload time: 2024/11/23

add to my favourite

Payment Methods

All payment methods are secure and covered by SeekIC Buyer Protection PLUS.

Notice: When you place an order, your payment is made to SeekIC and not to your seller. SeekIC only pays the seller after confirming you have received your order. We will also never share your payment details with your seller.
Product Details

Description



Features:

·High Efficiency: Up to 93%
·600mA Output Current (VCC1 = 3V, VOUT = 1.3V)
·Programmable Output Voltage: 0.85V to 1.55V
·2.5V to 5.5V Input Voltage Range
·1.5MHz Constant Frequency or Spread Spectrum Option
·Soft-Start LDOs
·Two LDO Regulators: 0.3V Dropout at 50mA PowerPath Controller
·Dynamically Regulates VCC BATT I2C
·Standard (100kHz) or Fast Mode (400kHz)
·24-Lead (4mm × 4mm) QFN Package


Application

`Intel's Microprocessor Supply (PXA27X)
`Portable Instruments


Pinout

Connection Diagram


Specifications

VCC1, VCC2, SDA, SCL Voltages ....................... 0.3V to 6V
RUN, VTRACK, VBACKUP, PGOOD, ADD7,
ADD6, FB, VCC BATT,
BATTFAULT Voltages .................................... 0.3V to VCC1
SW Voltage ................................... 0.3V to (VCC1 + 0.3V)
LDO1FB, LDO2FB Voltages .......................... 0.3V to VCC2
LDO1, LDO2 Voltages ................... 0.3V to (VCC2 + 0.3V)
LDO1, LDO2 Source Current ..................................... 50mA
VCC BATT Source Current ............................................ 8mA
P-Channel Switch Source Current (DC) ................... 800mA
N-Channel Switch Sink Current (DC) ....................... 800mA
Peak SW Sink and Source Current .............................. 1.3A
LDO1, LDO2, VCC BATT Output Short-Circuit
Duration................................................................ Indefinite
Operating Temperature Range (Note 2) ...40°C to 85°C
Junction Temperature (Note 3).................................. 125°C
Storage Temperature Range .................. 65°C to 125°C


Description

The LTC®3445 contains a high efficiency monolithic synchronous current mode buck regulator, two LDO regulators, a PowerPathTM controller and an I2CTM interface.

The buck regulator has a 6-bit programmable output range of 0.85V to 1.55V. Also, the buck regulator uses either a constant (1.5MHz) or a spread spectrum switching frequency. Using the spread spectrum option allows for a lower noise regulated output as well as low noise at the input. In addition, the regulated output voltage slew rate is programmable via the I2C interface.

The LTC3445 contains two LDO voltage regulators. The regulator output voltages are externally resistor programmable. Each LDO is capable of delivering up to 50mA.

The LTC3445 contains control circuitry (PowerPath) for automatic back-up battery selection. VBACKUP is typically a coin cell.

Typical supply current during operation is only 360A and drops to 27A in shutdown. The 2.5V to 5.5V input voltage range makes the LTC3445 ideal for single Li-Ion battery-powered applications. Automatic Burst Mode® operation increases efficiency at light loads, further extending battery life.




Customers Who Bought This Item Also Bought

Margin,quality,low-cost products with low minimum orders. Secure your online payments with SeekIC Buyer Protection.
You may also be interested in :
Potentiometers, Variable Resistors
RV24YN
WXD4-23-3W
Discrete Semiconductor Products
T508N12TOF
MUR20040
Soldering, Desoldering, Rework Products
TGK-900M-B
TGK-900M-1.6D
Line Protection, Backups
BX0023
A20B-1008-0550
Computers, Office - Components, Accessories
DS-4008HCI
LB104V03(A1)
Sensors, Transducers
GP2Y0D340K
PAN3509DH-TXWA
View more