EC7100VQI Datasheet, PDF (1/21 Pages) Altera Corporation – PWM DC/DC Controller with VS Inputs for FPGA Power Regulator

Enpirion^® Power Datasheet
EC7100VQI PWM DC/DC Controller with
VS Inputs for FPGA Power Regulator
DS-1043
The Altera® Enpirion® EC7100VQI is a Single-Phase
Synchronous-Buck PWM controller. The wide 3.3V to 25V input
voltage range is ideal for systems that run on battery or AC-
adapter power sources. The EC7100VQI is a low-cost solution for
applications requiring dynamically selected slew-rate controlled
output voltages. The soft-start and dynamic setpoint slew-rates are
capacitor programmed. Voltage identification logic-inputs select
four resistor-programmed setpoint reference voltages that directly
set the output voltage of the converter between 0.5V and 1.5V, and
up to 5V with a feedback voltage divider.
The EC7100VQI modulator has equivalent light-load efficiency,
faster transient performance, accurately regulated frequency
control and all internal compensation. These updates, together
with integrated MOSFET drivers and schottky bootstrap diode,
allow for a high-performance regulator that is highly compact and
needs few external components. The EC7100VQI has differential
remote sensing for output voltage and selectable switching
frequency. For maximum efficiency, the converter automatically
enters diode-emulation mode (DEM) during light-load conditions
such as system standby.
Datasheet
Features
• Input Voltage Range: 3.3V to 25V
• Output Voltage Range: 0.5V to 5V
• Precision Regulation
- Frequency Control Loop
- ±0.5% System Accuracy Over -10°C to +100°C
• Optimal Transient Response
• Output Remote Sense
• Extremely Flexible Output Voltage Programmability
- 2-Bit VS Selects Four Independent Setpoint Voltages
- Simple Resistor Programming of Setpoint Voltages
• Selectable 300kHz, 500kHz, 600kHz or 1MHz PWM Frequency in
Continuous Conduction
• Automatic Diode Emulation Mode for Highest Efficiency
• Power-OK Monitor for Soft-Start and Fault Detection
Applications
• FPGA power
• Digital processor power
• Mixed-signal ASIC power
+5V
C_AVIN1
R_FB1
NSNS1
GPIO
R_SET1
NSNS ₁
VS1 ₂
VS0 ₃
SREF ₄
SET0 ₅
SET1 ₆
R_AVIN2
GND
C_AVIN2
16 ^BOOT
15 ^UGATE
14 ^SW
EN
13
12 ^POK
11 ^FSW
C_BOOT
Q_HS
Q_LS
V_IN
3.3V TO 25V
CIN
L_O
C_SEN
0.5VV^OT^UO^T 5V
CO
NSNS1
R_SET3
R_FB
R_O
0
FIGURE 1. EC7100VQI APPLICATION SCHEMATIC WITH FOUR OUTPUT VOLTAGE SETPOINTS AND DCR CURRENT SENSE
101 Innovation Drive
San Jose, CA 95134
www.altera.com
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9001:2008
Registered
March 2014 Altera Corporation
09613
March 14, 2014
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