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参数资料
| 型号： | LTC3788IUH#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | DUAL SWITCHING CONTROLLER, 900 kHz SWITCHING FREQ-MAX, PQCC32 |
| 封装： | 5 X 5 MM, LEAD FREE, PLASTIC, MO-220WHHD, QFN-32 |
| 文件页数： | 1/32页 |
| 文件大小： | 386K |
| 代理商： | LTC3788IUH#PBF |
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LTC3788
1
3788fb
15nF
4.7F
2.7k
12.1k
VOUT
12V AT 5A
VOUT
24V AT 3A
VIN 4.5V TO 12V START-UP VOLTAGE
OPERATES THROUGH TRANSIENTS DOWN TO 2.5V
VIN
0.1F
100pF
0.1F
220F
TG1
BOOST1
SW1
BG1
FREQ
SS1 SGND SS2
SENSE1+
SENSE1–
VFB1
ITH1
VBIAS
LTC3788
INTVCC
PLLIN/MODE
TG2
BOOST2
SW2
BG2
SENSE2+
SENSE2–
VFB2
ITH2
PGND
0.1F
15nF
8.66k
220pF
232k
0.1F
4.7F
110k
3788 TA01a
220F
3.3H
1.25H
3m
4m
Typical applicaTion
DescripTion
2-Phase, Dual Output
Synchronous Boost Controller
The LTC3788 is a high performance 2-phase dual
synchronous boost converter controller that drives all
N-channel power MOSFETs. Synchronous rectification
increases efficiency, reduces power losses and eases
thermal requirements, allowing the LTC3788 to be used
in high power boost applications.
A constant-frequency current mode architecture allows a
phase-lockable frequency of up to 850kHz. OPTI-LOOP
compensationallowsthetransientresponsetobeoptimized
over a wide range of output capacitance and ESR values.
The LTC3788 features a precision 1.2V reference and dual
power good output indicators. A 4.5V to 38V input supply
range encompasses a wide range of system architectures
and battery chemistries.
Independent SS pins for each controller ramp the output
voltages during start-up. The PLLIN/MODE pin selects
among Burst Mode operation, pulse-skipping mode or
continuous inductor current mode at light loads.
For a leaded 28-lead SSOP package with a fixed current
limit and one PGOOD output, without phase modulation
or a clock output, see the LTC3788-1 data sheet.
L
, LT, LTC, LTM, Linear Technology, Burst Mode, OPTI-LOOP, PolyPhase and the Linear logo
are registered trademarks and No RSENSE and ThinSOT are trademarks of Linear Technology
Corporation. All other trademarks are the property of their respective owners. Protected by
U. S. Patents, including 5408150, 5481178, 5705919, 5929620, 6144194, 6177787, 6580258.
FeaTures
applicaTions
n
Synchronous Operation for Highest Efficiency and
Reduced Heat Dissipation
n
Wide Input Range: 4.5V to 38V (40V Abs Max) and
Operates Down to 2.5V After Start-Up
n
Output Voltages Up to 60V
n
±1% 1.2V Reference Voltage
n
RSENSE or Inductor DCR Current Sensing
n
100% Duty Cycle Capability for Synchronous MOSFET
n
Low Quiescent Current: 125A
n
Phase-Lockable Frequency (75kHz to 850kHz)
n
Programmable Fixed Frequency (50kHz to 900kHz)
n
Selectable Current Limit
n
Adjustable Output Voltage Soft-Start
n
Power Good Output Voltage Monitors
n
Low Shutdown Current IQ: <8μA
n
Internal LDO Powers Gate Drive from VBIAS or EXTVCC
n
Thermally Enhanced Low Profile 32-Pin 5mm × 5mm
QFN Package
n
Industrial
n
Automotive
n
Medical
n
Military
Efficiency and Power Loss
vs Output Current
OUTPUT CURRENT (A)
40
EFFICIENCY
(%)
POWER
LOSS
(mW)
50
60
70
80
3788 TA01b
30
20
10
0
90
100
10
100
1000
1
0.1
10000
0.01
0.1
1
10
VIN = 12V
VOUT = 24V
Burst Mode OPERATION
FIGURE 9 CIRCUIT
0.0001 0.001
0.00001
相关PDF资料 |
PDF描述 |
|---|---|
| LTC3788IGN-1#PBF | DUAL SWITCHING CONTROLLER, 900 kHz SWITCHING FREQ-MAX, PDSO28 |
| LTC3788EGN-1#TRPBF | DUAL SWITCHING CONTROLLER, 900 kHz SWITCHING FREQ-MAX, PDSO28 |
| LTC3789EGN#TRPBF | 0.1 A SWITCHING CONTROLLER, 710 kHz SWITCHING FREQ-MAX, PDSO28 |
| LTC3789EUFD#TRPBF | 0.1 A SWITCHING CONTROLLER, 710 kHz SWITCHING FREQ-MAX, PQCC28 |
| LTC3789EGN#PBF | 0.1 A SWITCHING CONTROLLER, 710 kHz SWITCHING FREQ-MAX, PDSO28 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3789EGN#PBF | 功能描述:IC REG CTRLR BST PWM CM 28-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX |
| LTC3789EGN#PBF | 制造商:Linear Technology 功能描述:IC DC-DC CONV 600kHz SSOP28 |
| LTC3789EGN#TRPBF | 功能描述:IC REG CTRLR BST PWM CM 28-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX |
| LTC3789EUFD#PBF | 功能描述:IC REG CTRLR BST PWM CM 28-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX |
| LTC3789EUFD#TRPBF | 功能描述:IC REG CTRLR BST PWM CM 28-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX |
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