3CG708 Datasheet Text
Dual 1 A, 18 V, Synchronous Step-Down Regulator with Fail-Safe Voltage Monitoring
Data Sheet
Features
Input voltage: 4.5 V to 18 V ±1.0% output accuracy Integrated MOSFET: 110 mΩ/60 mΩ typical Continuous output current: 1 A/1 A Power fail parator generates warning Power-on reset with programmable delay timer Adjustable voltage monitor for power-down (Channel 2) Watchdog refresh input Dual phase with 180° out-of-phase operation Fixed switching frequency: 300 kHz Internal pensation and soft start Stable with low ESR output ceramic capacitors Precision enable input Power feedback during power-off UVLO, OCP, OVP, and thermal shutdown protection
VIN CIN1 RPFI_TOP PFI RPFI_BOT C1BST VOUT1 COUT1 L1 RTOP1 RBOT1 SW1 PGND1 FB1 GND VREG SW2 PGND2 FB2 TIMER CTIMER RBOT2
11036-001
ADP2311
TYPICAL APPLICATION CIRCUIT
PFO POR WDI EN PVIN1 RSTO PVIN2 RVM2_TOP VM2 RVM2_BOT BST1 CIN2 VIN
ADP2311
BST2
C2BST L2 RTOP2 VOUT2 COUT2
CVREG
Figure 1.
100 95 90 VOUT = 3.3V VOUT = 5V
APPLICATIONS
Industrial and instrumentation Healthcare and medical DC-to-DC point of load applications
EFFICIENCY (%)
85 80 75 70 65 60 55 0 0.2 0.4 0.6 0.8 1.0
11036-002
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50
OUTPUT CURRENT (A)
Figure 2. Efficiency vs. Output Current at VIN = 12 V, fSW = 300 kHz
GENERAL DESCRIPTION
The ADP2311 is a fully integrated, dual output, synchronous step-down dc-to-dc regulator. The regulator operates from input voltages of 4.5 V to 18 V, and the output can regulate down to 0.6 V. Each channel can provide up to 1 A of continuous output current. The ADP2311 integrates the high-side and low-side MOSFETs to provide a very high efficiency, pact solution. Both channels of the regulator run at 180° out of phase to reduce the input ripple current and the input capacitor...
