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参数资料
| 型号： | LTC3604EUD#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/24页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC 2.5A 16QFN |
| 标准包装： | 121 |
| 类型： | 降压（降压） |
| 输出数： | 1 |
| 输入电压： | 3.6 V ~ 15 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 800kHz ~ 4MHz |
| 电流 - 输出： | 2.5A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WFQFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 16-QFN-EP（3x3） |
| 产品目录页面： | 1335 (CN2011-ZH PDF) |
LTC3604
2.5A, 15V Monolithic
Synchronous Step-Down
Regulator
FEATURES
DESCRIPTION
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3.6V to 15V Operating Input Voltage Range
2.5A Output Current
Up to 95% Ef?ciency
Very Low Duty Cycle Operation: 5% at 2.25MHz
Adjustable Switching Frequency: 800kHz to 4MHz
External Frequency Synchronization
The LTC ? 3604 is a high ef?ciency, 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.
User Selectable Low Ripple (20mV P-P Typical)
0.6V Reference Allows Low Output Voltages
Short-Circuit Protected
Output Voltage Tracking Capability
Power Good Status Output
Available in Small, Thermally Enhanced, 16-Pin QFN
Distributed Power Systems
Lithium-Ion Battery-Powered Instruments
Point-of-Load Power Supplies
n Current Mode Operation for Excellent Line and Load
Transient Response
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Burst Mode ? (No Load I Q = 300μA) or Forced
Continuous Operation
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(3mm × 3mm) and MSOP Packages
APPLICATIONS
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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.
TYPICAL APPLICATION
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
ef?ciency for a given application. Maximum light load
ef?ciency is achieved with the selection of Burst Mode
operation while forced continuous mode provides minimum
output ripple and constant frequency operation.
Ef?ciency and Power Loss vs Load Current
High Ef?ciency 2.5A Step-Down Regulator
100
90
10
SW
V ON
V IN
3.6V TO 15V
22μF
2.2μF
V IN BOOST
RUN
PGOOD
TRACK/SS
LTC3604
INTV CC
FB
ITH
RT
MODE/SYNC
SGND
PGND
0.1μF
1μH
180k
40k
3604 TA01a
22pF
V OUT
3.3V
2.5A
47μF
80
70
60
50
40
30
20
10
0
V IN = 5V
V IN = 12V
f O = 2MHz
Burst Mode OPERATION
1
0.1
0.01
0.001
0.001
0.01
0.1 1
10
LOAD CURRENT (A)
3604 TA01b
3604f
1
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