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LT8610ACLT8610AC-1 Series

42V, 3.5A Synchronous Step-Down Regulator with 2.5μA Quiescent Current

Manufacturer: Analog Devices

Catalog

42V, 3.5A Synchronous Step-Down Regulator with 2.5μA Quiescent Current

PartTopologyVoltage - Input (Max) [Max]Voltage - Output (Max) [Max]Mounting TypeSupplier Device PackageOutput TypeSynchronous RectifierOperating Temperature [Max]Operating Temperature [Min]Current - OutputVoltage - Input (Min) [Min]Number of OutputsFunctionOutput ConfigurationFrequency - Switching [Max]Frequency - Switching [Min]Package / CasePackage / CaseVoltage - Output (Min/Fixed)Output TypeVoltage - Output (Min/Fixed) [Min]
Analog Devices
LT8610ACHMSE#TRPBF
Buck
42 V
42 V
Surface Mount
16-MSOP-EP
Adjustable
150 °C
-40 °C
3.5 A
3 V
1
Step-Down
Positive
2.2 MHz
200 kHz
16-TFSOP
Exposed Pad
0.118 in
3 mm
0.8 V
Analog Devices
LT8610ACIMSE-1#TRPBF
Buck
42 V
42 V
Surface Mount
16-MSOP-EP
Adjustable
125 ¯C
-40 °C
3.5 A
3 V
1
Step-Down
Positive
2.2 MHz
1.5 MHz
16-TFSOP
Exposed Pad
0.118 in
3 mm
0.8 V
Analog Devices
LT8610AIMSE-5#TRPBF
Buck
42 V
Surface Mount
16-MSOP-EP
125 ¯C
-40 °C
3.5 A
3.4 V
1
Step-Down
Positive
2.2 MHz
200 kHz
16-TFSOP
Exposed Pad
0.118 in
3 mm
5 V
1.81 mOhm
Analog Devices
LT8610ABHMSE#TRPBF
Buck
42 V
42 V
Surface Mount
16-MSOP-EP
Adjustable
150 °C
-40 °C
3.5 A
3.4 V
1
Step-Down
Positive
2.24 MHz
200 kHz
16-TFSOP
Exposed Pad
0.118 in
3 mm
0.97 V
Analog Devices
LT8610ACEMSE-1#PBF
Buck
42 V
42 V
Surface Mount
16-MSOP-EP
Adjustable
125 ¯C
-40 °C
3.5 A
3 V
1
Step-Down
Positive
2.2 MHz
1.5 MHz
16-TFSOP
Exposed Pad
0.118 in
3 mm
0.8 V
Analog Devices
LT8610EMSE#TRPBF
Buck
42 V
40 V
Surface Mount
16-MSOP-EP
Adjustable
125 ¯C
-40 °C
2.5 A
3.4 V
1
Step-Down
Positive
2.2 MHz
200 kHz
16-TFSOP
Exposed Pad
0.118 in
3 mm
0.97 V
Analog Devices
LT8610AEMSE#TRPBF
Buck
42 V
42 V
Surface Mount
16-MSOP-EP
Adjustable
125 ¯C
-40 °C
3.5 A
3.4 V
1
Step-Down
Positive
2.2 MHz
200 kHz
16-TFSOP
Exposed Pad
0.118 in
3 mm
0.97 V
Analog Devices
LT8610AIMSE#TRPBF
Buck
42 V
42 V
Surface Mount
16-MSOP-EP
Adjustable
125 ¯C
-40 °C
3.5 A
3.4 V
1
Step-Down
Positive
2.2 MHz
200 kHz
16-TFSOP
Exposed Pad
0.118 in
3 mm
0.97 V
Analog Devices
LT8610AEMSE-3.3#TRPBF
Buck
42 V
Surface Mount
16-MSOP-EP
125 ¯C
-40 °C
3.5 A
3.4 V
1
Step-Down
Positive
2.2 MHz
200 kHz
16-TFSOP
Exposed Pad
0.118 in
3 mm
3.3 V
1.81 mOhm
Analog Devices
LT8610ACHMSE#PBF
Buck
42 V
42 V
Surface Mount
16-MSOP-EP
Adjustable
150 °C
-40 °C
3.5 A
3 V
1
Step-Down
Positive
2.2 MHz
200 kHz
16-TFSOP
Exposed Pad
0.118 in
3 mm
0.8 V

Key Features

• LT8610 Feature Set, Plus:3V Minimum Input Voltage800mV Feedback Voltage3.5A Maximum Output CurrentFast 30ns Minimum Switch-On TimeImproved Burst Mode EfficiencyImproved EMI
• 3V Minimum Input Voltage
• 800mV Feedback Voltage
• 3.5A Maximum Output Current
• Fast 30ns Minimum Switch-On Time
• Improved Burst Mode Efficiency
• Improved EMI
• Wide Input Voltage Range: 3V to 42V
• Ultralow Quiescent Current Burst Mode®Operation:2.5μA IQRegulating 12VINto 3.3VOUT
• 2.5μA IQRegulating 12VINto 3.3VOUT
• Low Dropout Under All Conditions: 200mV at 1A
• High Efficiency Synchronous Operation:95% Efficiency at 1A, 5VOUTfrom 12VIN93% Efficiency at 1A, 3.3VOUTfrom 12VIN
• 95% Efficiency at 1A, 5VOUTfrom 12VIN
• 93% Efficiency at 1A, 3.3VOUTfrom 12VIN
• Safely Tolerates Inductor Saturation in Overload
• Adjustable and Synchronizable Frequency:LT8610AC: 200kHz to 2.2MHzLT8610AC-1: 1.5MHz to 2.2MHz
• LT8610AC: 200kHz to 2.2MHz
• LT8610AC-1: 1.5MHz to 2.2MHz
• Accurate 1.015V Enable Pin Threshold
• Output Soft-Start and Tracking
• Small Thermally Enhanced 16-Lead MSOP Package
• AEC-Q100 Qualified for Automotive Applications

Description

AI
The LT8610AC/LT8610AC-1 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that consumes only 2.5μA of quiescent current. Compared to the LT8610AB, the LT8610AC/LT8610AC-1 has a lower feedback voltage of 800mV and a lower minimum VINof 3V. The LT8610AC/LT8610AC-1 has the same additional features of the LT8610AB as compared to the LT8610: higher maximum output current of 3.5A, faster minimum on time of 30ns, and higher light load efficiency.The LT8610AC/LT8610AC-1 has a SYNC pin for synchronization to an external clock. A capacitor on the TR/SS pin programs the output voltage ramp rate during startup. The PG flag signals when VOUTis within ±8% of the programmed output voltage as well as fault conditions. The LT8610AC-1 has internal compensation optimized for high switching frequencies resulting in improved transient response compared to the LT8610AC. The LT8610AC-1 also has a feature which will soft-start the part when exiting dropout or brownout conditions reducing output voltage overshoot.Feedback VoltageMin VINOutput CurrentNotesLT8610AC-10.80V3.0V3.5AFSW= 1.5MHz to 2.2MHz, Optimized Transient ResponseLT8610AC0.80V3.0V3.5AFSW= 200kHz to 2.2MHzLT8610AB0.97V3.4V3.5AImproved Burst Mode EfficiencyLT8610AX0.97V3.4V3.5A175°C Max Junction TempLT8610A0.97V3.4V3.5AHigher IOUT, 30ns Min On TimeLT86100.97V3.4V2.5A-ApplicationsAutomotive and Industrial SuppliesGSM Power Supplies