Datasheet LTC7815 (Analog Devices) - 38

LTC7815
TYPICAL APPLICATION
VOUT1 LTC7815 475k 10pF 34k VFB1 SENSE1– 47pF 1nF 100Ω SENSE1+ 560pF 3.01k I 100k TH1 PGOOD1 INTVCC 10µF 0.1µF TG1 MTOP1 L1 TRACK/SS1 1.0µH 0.009Ω VOUT1 100k SW1 12V FREQ 0.1µF 3A V BOOST1 C OUT2 OUT1 10µF 10pF 649k BG1 MBOT1 ×2 68.1k VFB2 D1 47µF VBIAS 0.1µF 680pF 5.1k PGND ITH2 4.7µF 0.1µF INTV TRACK/SS2 CC D2 V 10µF OUT3 10pF 787k TG2 MTOP2 L2 68.1k BOOST2 1.0µH 0.007Ω V V 0.1µF OUT2 FB3 8.5V 150pF SW2 4A COUT2 BG2 MBOT2 10µF 1.5nF 3.01k I ×2 TH3 100Ω 0.1µF SENSE2+ SS3 1nF PLLINMODE SENSE2– VOUT3 EXTVCC D3 15V MTOP1, 2: INFINEON BSZ097N04LS C + OUT3B 100k COUT3A 2A MBOT1, 2: INFINEON BSZ097N04LS INTVCC OV3 TG3 MTOP3 L3 10µF 68µF MTOP3: INFINEON BSC027N04LS 0.33µH ×3 0.003Ω VIN MBOT3: INFINEON BSC027N04LS RUN1 SW3 2.5V TO 38V L1: COILCRAFT XAL5030-102MEB 0.1µF RUN2 + (START-UP ABOVE 5V) L2: COILCRAFT XAL5030-102MEB CINA L3: COILCRAFT XAL5030-331ME RUN3 220µF BOOST3 CINB CINA: SANYO 50CE220LX 10µF CINB: TDK C3225X7R1H106M250AC BG3 MBOT3 ×2 COUT1: TDK C3225X5R1E106M250AA COUT2: TDK C3225X5R1C106M SENSE3– 100Ω * WHEN VIN < 3.5, MAXIMUM LOAD CURRENT C AVAILABLE OF CH3 IS REDUCED OUT3A: SANYO 50SVPF68M 1nF COUT3B: TDK C3225X7R1H106M250AC D1, D2: CMDSH-4E SENSE3+ * VOUT3 IS 15V WHEN VIN < 15V FOLLOWS V D3: BAS140W IN WHEN VIN > 15V 7815 F11
Figure 11. High Efficiency Wide Input Range 2.1MHz Dual 12V/8.5V Converter RELATED PARTS PART NUMBER DESCRIPTION COMMENTS
LTC3859AL 38V Triple Output, Buck/Buck/Boost Synchronous 4.5V (Down to 2.5V After Start-Up) ≤ VIN ≤ 38V, IQ = 28μA Buck VOUT Controller PLL Fixed Operating Frequency 50kHz to Range: 0.8V to 24V, Boost VOUT Up to 60V 900kHz LTC7812 38V Synchronous Boost+Buck Controller Low EMI 4.5V (Down to 2.5V After Start-Up) ≤ VIN ≤ 38V, Boost VOUT up to 60V, and Low Input/Output Ripple Buck VOUT Range: 0.8V to 24V, IQ = 29μA, 5mm × 5mm QFN-32 LTC3857/LTC3857-1 38V Low IQ, Dual Output 2-Phase Synchronous 4V ≤ VIN ≤ 38V, 0.8V ≤ VOUT ≤ 24V, IQ = 50μA/170μA, PLL Fixed Operating LTC3858/LTC3858-1 Step-Down Controller with 99% Duty Cycle Frequency 50kHz to 900kHz LTC7800 60V Low IQ, High Frequency Synchronous 4V ≤ VIN ≤ 60V, 0.8V ≤ VOUT ≤ 24V, IQ = 50μA, PLL Fixed Frequency 320kHz Step-Down Controller to 2.25MHz LTC3899 60V Low IQ, Triple Output, Buck/Buck/Boost 4.5V (Down to 2.2V After Start-Up) ≤ VIN ≤ 60V, IQ = 28μA, Buck and Boost Synchronous Controller VOUT Up to 60V LTC3897 65V Low IQ, Single Output 2-Phase Synchronous 4.5V ≤ VIN ≤ 65V, VOUT Up to 60V, IQ = 55μA, PLL Fixed Frequency 50kHZ to Boost Controller with Input/Output Protection 900kHz LTC3892 60V Low IQ, Dual 2-Phase Synchronous Step-Down 4.5V ≤ VIN ≤ 60V, 0.8V ≤ VOUT ≤ 0.99VIN, IQ = 50μA, PLL Fixed Frequency Controller with Adjustable Gate Drive Voltage 50kHz to 900kHz 7815f 38 LT 0118 • PRINTED IN USA www.linear.com/LTC7815 ANALOG DEVICES, INC. 2018 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS FUNCTIONAL DIAGRAM OPERATION APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION TYPICAL APPLICATION RELATED PARTS