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参数资料
| 型号： | LTC3604IUD#TRPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING REGULATOR, PQCC16 |
| 封装： | 3 X 3 MM, LEAD FREE, PLASTIC, MO-220WEED-2, QFN-16 |
| 文件页数： | 1/24页 |
| 文件大小： | 277K |
| 代理商： | LTC3604IUD#TRPBF |
LTC3604
1
3604f
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
2.5A, 15V Monolithic
Synchronous Step-Down
Regulator
n Distributed Power Systems
n Lithium-Ion Battery-Powered Instruments
n Point-of-Load Power Supplies
L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks
and Hot Swap is a registered trademark of Linear Technology Corporation. All other trademarks
are the property of their respective owners. Protected by U.S. Patents, including 5481178,
5847554, 6580258, 6304066, 6476589, 6774611.
Efciency and Power Loss vs Load Current
n 3.6V to 15V Operating Input Voltage Range
n 2.5A Output Current
n Up to 95% Efciency
n Very Low Duty Cycle Operation: 5% at 2.25MHz
n Adjustable Switching Frequency: 800kHz to 4MHz
n External Frequency Synchronization
n Current Mode Operation for Excellent Line and Load
Transient Response
n User Selectable Low Ripple (20mVP-P Typical)
Burst Mode
(No Load IQ = 300μA) or Forced
Continuous Operation
n 0.6V Reference Allows Low Output Voltages
n Short-Circuit Protected
n Output Voltage Tracking Capability
n Power Good Status Output
n Available in Small, Thermally Enhanced, 16-Pin QFN
(3mm
× 3mm) and MSOP Packages
The LTC
3604 is a high efciency, monolithic synchronous
buck regulator using a phase-lockable controlled on-time,
current mode architecture capable of supplying up to 2.5A
of output current. The operating supply voltage range is
from 3.6V to 15V, making it suitable for a wide range of
power supply applications.
The operating frequency is programmable from 800kHz to
4MHz with an external resistor enabling the use of small
surface mount inductors. For switching noise sensitive
applications, the LTC3604 can be externally synchronized
over the same frequency range. An internal phase-locked
loop aligns the on-time of the top power MOSFET to the
internal or external clock. This unique constant frequency/
controlled on-time architecture is ideal for high step-down
ratio applications that demand high switching frequencies
and fast transient response.
The LTC3604 offers two operational modes: Burst Mode
operation and forced continuous mode to allow the user
to optimize output voltage ripple, noise, and light load
efciency for a given application. Maximum light load
efciency is achieved with the selection of Burst Mode
operationwhileforcedcontinuousmodeprovidesminimum
output ripple and constant frequency operation.
VIN
RUN
PGOOD
TRACK/SS
LTC3604
PGND
SGND
BOOST
INTVCC
ITH
RT
MODE/SYNC
SW
VON
FB
2.2μF
22pF
0.1μF
47μF
VOUT
3.3V
2.5A
180k
40k
3604 TA01a
1μH
22μF
VIN
3.6V TO 15V
LOAD CURRENT (A)
30
EFFICIENCY
(%)
POWER
LOSS
(W)
90
100
20
10
80
50
70
60
40
0.001
0.1
1
10
3604 TA01b
0
0.01
10
1
0.1
0.001
0.01
VIN = 5V
VIN = 12V
fO = 2MHz
Burst Mode OPERATION
High Efciency 2.5A Step-Down Regulator
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| LTC3604IUD#PBF | SWITCHING REGULATOR, PQCC16 |
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