Datasheet LTC3636, LTC3636-1 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | Dual Channel 6A, 20V Monolithic Synchronous Step-Down Regulator |
| Pages / Page | 28 / 1 — FEATURES. DESCRIPTION. Wide VIN Range: 3.1V to 20V. Wide VOUT Range:. … |
| File Format / Size | PDF / 944 Kb |
| Document Language | English |
FEATURES. DESCRIPTION. Wide VIN Range: 3.1V to 20V. Wide VOUT Range:. 0.6V to 5V (LTC3636). 1.8V to 12V (LTC3636-1)
Text Version of Document
LTC3636/LTC3636-1 Dual Channel 6A, 20V Monolithic Synchronous Step-Down Regulator
FEATURES DESCRIPTION
n
Wide VIN Range: 3.1V to 20V
The LTC®3636/LTC3636-1 is a high efficiency, dual-channel n
Wide VOUT Range:
monolithic synchronous buck regulator using a controlled
0.6V to 5V (LTC3636)
on-time current mode architecture, with phase lockable
1.8V to 12V (LTC3636-1)
switching frequency. The operating supply voltage range is n
Output Current per Channel: 6A
from 3.1V to 20V, making it suitable for lithium-ion battery n
High Efficiency: Up to 95%
stacks as well as point of load power supply applications n
Die Temperature Monitor
from a 12V or 5V input. n
Adjustable Switching Frequency: 500kHz to 4MHz
The operating frequency is programmable from 500kHz to n
External Frequency Synchronization
4MHz with an external resistor and may be synchronized n
Current Mode Operation for Excellent Line and
to an external clock signal. The high frequency capability
Load Transient Response
allows the use of small surface mount inductors and n 0.6V Reference Allows Low Output Voltages capacitors. The unique constant frequency/controlled n User Selectable Burst Mode® Operation or Forced on-time architecture is ideal for high step-down ratio ap- Continuous Operation plications that operate at high frequency while demanding n Output Voltage Tracking and Soft-Start Capability fast transient response. n Short-Circuit Protected n Overvoltage Input and Overtemperature Protection The LTC3636/LTC3636-1 can select between forced con- n Power Good Status Outputs tinuous mode and high efficiency Burst Mode operation. n Low Profile 4mm × 5mm 28-Lead QFN Package The LTC3636 and LTC3636-1 differ in their output voltage sense range.
APPLICATIONS
All registered trademarks and trademarks are the property of their respective owners. Protected by U.S. Patents including 5481178, 5847554, 6580258, 6304066, 6476589, 6774611. n Distributed Power Systems n Battery-Powered Instruments n Point-of-Load Power Supplies
TYPICAL APPLICATION
VIN 10V TO 20V
Efficiency vs Load Current
47µF VIN2 VIN1 x2 100 RUN1 INTVCC fSW = 2MHz RUN2 ITH1 4.7µF 97 LTC3636/ VIN = 12V LTC3636-1 ITH2 94 RT 91 TMON MODE/SYNC TRACKSS2 TRACKSS1 88 PGOOD2 PGOOD1 85 BOOST2 BOOST1 82 0.1µF 0.1µF EFFICIENCY (%) 0.56µH 0.56µH 79 VOUT2 SW2 SW1 VOUT1 5V AT 6A 3.3V AT 6A 76 47µF 47µF 73.2k 45.3k V 73 OUT = 5V 22pF 22pF VOUT = 3.3V VFB2 GND VFB1 70 10k 10k 0 0.6 1.2 1.8 2.4 3 3.6 4.2 4.8 5.4 6.0 LOAD CURRENT (A) 3636 TA01a 3636 TA01b 3636fb For more information www.linear.com/LTC3636 1 Document Outline Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Operation Applications Information Package Description Typical Application Related Parts
FEATURES DESCRIPTION
n
Wide VIN Range: 3.1V to 20V
The LTC®3636/LTC3636-1 is a high efficiency, dual-channel n
Wide VOUT Range:
monolithic synchronous buck regulator using a controlled
0.6V to 5V (LTC3636)
on-time current mode architecture, with phase lockable
1.8V to 12V (LTC3636-1)
switching frequency. The operating supply voltage range is n
Output Current per Channel: 6A
from 3.1V to 20V, making it suitable for lithium-ion battery n
High Efficiency: Up to 95%
stacks as well as point of load power supply applications n
Die Temperature Monitor
from a 12V or 5V input. n
Adjustable Switching Frequency: 500kHz to 4MHz
The operating frequency is programmable from 500kHz to n
External Frequency Synchronization
4MHz with an external resistor and may be synchronized n
Current Mode Operation for Excellent Line and
to an external clock signal. The high frequency capability
Load Transient Response
allows the use of small surface mount inductors and n 0.6V Reference Allows Low Output Voltages capacitors. The unique constant frequency/controlled n User Selectable Burst Mode® Operation or Forced on-time architecture is ideal for high step-down ratio ap- Continuous Operation plications that operate at high frequency while demanding n Output Voltage Tracking and Soft-Start Capability fast transient response. n Short-Circuit Protected n Overvoltage Input and Overtemperature Protection The LTC3636/LTC3636-1 can select between forced con- n Power Good Status Outputs tinuous mode and high efficiency Burst Mode operation. n Low Profile 4mm × 5mm 28-Lead QFN Package The LTC3636 and LTC3636-1 differ in their output voltage sense range.
APPLICATIONS
All registered trademarks and trademarks are the property of their respective owners. Protected by U.S. Patents including 5481178, 5847554, 6580258, 6304066, 6476589, 6774611. n Distributed Power Systems n Battery-Powered Instruments n Point-of-Load Power Supplies
TYPICAL APPLICATION
VIN 10V TO 20V
Efficiency vs Load Current
47µF VIN2 VIN1 x2 100 RUN1 INTVCC fSW = 2MHz RUN2 ITH1 4.7µF 97 LTC3636/ VIN = 12V LTC3636-1 ITH2 94 RT 91 TMON MODE/SYNC TRACKSS2 TRACKSS1 88 PGOOD2 PGOOD1 85 BOOST2 BOOST1 82 0.1µF 0.1µF EFFICIENCY (%) 0.56µH 0.56µH 79 VOUT2 SW2 SW1 VOUT1 5V AT 6A 3.3V AT 6A 76 47µF 47µF 73.2k 45.3k V 73 OUT = 5V 22pF 22pF VOUT = 3.3V VFB2 GND VFB1 70 10k 10k 0 0.6 1.2 1.8 2.4 3 3.6 4.2 4.8 5.4 6.0 LOAD CURRENT (A) 3636 TA01a 3636 TA01b 3636fb For more information www.linear.com/LTC3636 1 Document Outline Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Operation Applications Information Package Description Typical Application Related Parts
