Datasheet LT8606, LT8606B (Analog Devices)

LT8606/LT8606B 42V, 350mA Synchronous Step-Down Regulator with 2.5µA Quiescent Current
FEATURES DESCRIPTION
n
Wide Input Voltage Range: 3.0V to 42V
The LT®8606 is a compact, high efficiency, high speed n
Ultralow Quiescent Current Burst Mode
®
Operation:
synchronous monolithic step-down switching regulator n
<3µA IQ Regulating 12VIN to 3.3VOUT
that consumes only 1.7µA of non-switching quiescent n
Output Ripple <10mV
current. The LT8606 can deliver 350mA of continuous
P-P
n
High Efficiency 2MHz Synchronous Operation:
current. Low ripple Burst Mode operation enables high n
>92% Efficiency at 0.35A, 12V
efficiency down to very low output currents while keeping
IN to 5VOUT
n
350mA Maximum Continuous Output
the output ripple below 10mVP-P. Internal compensation n
Fast Minimum Switch-On Time: 35ns
with peak current mode topology allows the use of small n
Adjustable and Synchronizable: 200kHz to 2.2MHz
inductors and results in fast transient response and good n
Spread Spectrum Frequency Modulation for Low EMI
loop stability. The EN/UV pin has an accurate 1V threshold n Allows Use of Small Inductors and can be used to program VIN undervoltage lockout or n Low Dropout to shut down the LT8606. The PG pin signals when VOUT n Peak Current Mode Operation is within ±8.5% of the programmed output voltage as well n Accurate 1V Enable Pin Threshold as fault conditions. n Internal Compensation The MSOP package includes a SYNC pin to synchronize n Output Soft-Start and Tracking to an external clock, or to select Burst Mode operation n Small Thermally Enhanced 10-Lead MSOP Package or pulse-skipping with or without spread-spectrum; the or 8-Pin 2mm × 2mm DFN Package TR/SS pin programs soft-start or tracking. The DFN pack- age omits these pins and can be purchased in pulse-skip- ping or Burst Mode operation variety.
APPLICATIONS PACKAGE SYNC FUNCTIONALITY
n General Purpose Step-Down Converter LT8606MSE MSE Programmable n Low EMI Step Down LT8606DFN DFN Burst Mode Operation All registered trademarks and trademarks are the property of their respective owners. LT8606BDFN DFN Pulse-Skipping Mode
TYPICAL APPLICATION 12VIN to 5VOUT Efficiency 5V, 2MHz Step-Down
100 L = 10µH 95 f V SW = 2MHz IN VIN BST 5.5V TO 42V C2 C1 L1 90 EN/UV 1µF 0.1µF 10µH VOUT 85 SYNC SW 5V R4 350mA 80 100k INTV LT8606 CC PG POWER GOOD 75 C3 C5 1µF 10pF 70 TR/SS EFFICIENCY (%) C6 65 10nF RT GND FB R2 C4 60 R1 R3 1M 10µF 55 18.2k 187k X7R 0805 50 0 50 100 150 200 250 300 350 8606 TA01a fSW = 2MHz IOUT (mA) L1 = XFL3010-103ME 8606 TA01b Rev C Document Feedback For more information www.analog.com 1 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS BLOCK DIAGRAM OPERATION APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION REVISION HISTORY TYPICAL APPLICATION RELATED PARTS