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参数资料
| 型号： | LTC3613IWKH#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/36页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 15A 56QFN |
| 标准包装： | 40 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.6 V ~ 5.5 V |
| 输入电压： | 4.5 V ~ 24 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 200kHz ~ 1MHz |
| 电流 - 输出： | 15A |
| 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： | 56-VFQFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 56-QFN 多焊盘（7x9） |
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LTC3613
24V, 15A Monolithic
Step Down Regulator with
Differential Output Sensing
FEATURES
DESCRIPTION
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Wide V IN Range: 4.5V to 24V;
V OUT Range: 0.6V to 5.5V at up to 15A
0.67% Output Voltage Accuracy
Controlled On-Time Valley Current Mode Architecture,
Excellent Current Sharing Capability
Frequency Programmable from 200kHz to 1MHz
and Synchronizable to External Clock
R SENSE or Inductor DCR Current Sensing With
Accurate Current Limit
Fast Transient Response
Differential Output Voltage Sensing Allowing 500mV
Common Mode Remote Ground
t ON(MIN) = 65ns; t OFF(MIN) = 105ns
Overvoltage Protection and Current Limit Foldback
Power Good Output Voltage Monitor
Voltage Tracking Start-Up
External V CC Input for Bypassing Internal LDO
Micropower Shutdown: I Q = 15μA
7mm × 9mm 56-pin QFN Package
The LTC ? 3613 is a monolithic synchronous step-down
switching regulator capable of regulating outputs from 0.6V
to 5.5V with up to 15A output current. The controlled on-time
constant frequency valley current mode architecture allows for
both fast transient response and constant frequency switch-
ing in steady-state operation, independent of V IN , V OUT and
load. This also provides excellent current sharing capability.
Differential output voltage sensing along with a precision
internal reference combine to offer ±0.67% output regula-
tion, even if the output ground reference deviates from
local ground by 500mV. The switching frequency can be
programmed from 200kHz to 1MHz with an external resis-
tor. The switching frequency is also phase synchronizable
to an external clock in applications where switching noise/
EMI reduction is crucial.
Very low t ON and t OFF times allow for near 0% and near 100%
duty cycles, respectively. Voltage tracking soft start-up is
provided for tracking and sequencing applications. Safety fea-
APPLICATIONS
tures include output overvoltage protection, programmable
current limit with foldback, and power good monitoring.
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Distributed Power System
Point-of-Load Converters
Servers
L , LT, LTC, LTM, OPTI-LOOP, Linear Technology and the Linear logo are registered trademarks
and Hot Swap and No R SENSE is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners. Protected by U.S. Patents including
5481178, 5487554, 6580258, 6304066, 6476589, 6774611.
TYPICAL APPLICATION
High Efficiency High Power Step-Down Converter
Efficiency and Power Loss
vs Load Current
SENSE +
INTV CC
100k
0.1μF
PV IN
SV IN
LTC3613
PGOOD V OUT
SENSE –
RUN
V RNG
MODE/PLLIN SW
EXTV CC
0.1μF
1000pF
0.1μF
+
82μF
10Ω
10Ω
0.47μH
V IN
4.5V TO 24V
1.5mΩ
15k
V OUT
1.5V
15A
100
90
80
70
60
50
40
30
PULSE-SKIPPING MODE
FORCED
CONTINUOUS
MODE
3.5
3.0
2.5
2.0
1.5
1.0
270pF
47pF
21k
TRACK/SS
ITH
BOOST
INTV CC
PGND
4.7μF
10k
+
330μF
× 2
20
10
0
0.01
0.1
1
LOAD CURRENT (A)
V IN = 12V
V OUT = 1.5V
10
0.5
0
115k
RT
SGND
V OSNS+
V OSNS–
3613 TA01a
3613 TA01
3613fa
1
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