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Part: NCP1511FCT1G
Category:
Power Management
-> DC-DC Converters
-> DC-DC Switching
-> Converters
Description: Multi Mode Buck DC-DC Converter With Low iq Mode , Package: 9 Pin Flipchip Csp, Pins=9
Company: ON Semiconductor
Datasheet: Download NCP1511FCT1G datasheet File size : 1044 kB
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Datasheet text preview:
NCP1511 Advance Information PWM Buck Converter with a Very Low Iq During Low Load Conditions
The NCP1511 is a tri-mode regulator that operates either as a Synchronized PWM Buck Converter, PWM Buck Converter with internal oscillator or as a Pulsed Switching Regulator. If a synchronization signal is present, the NCP1511 operates as a current mode PWM converter with synchronous rectification. The optional external frequency input signal allows the user to control the location of the spurious frequency noise generated by a PWM converter. The Pulsed Switching Regulator mode is active when the Sync Pin is Low. The Pulsed Mode is an extremely low quiescent current Buck Converter. NCP1511 operates in a PWM mode with an internal osc i l l a t or when the Sync Pin is held high. The NCP1511 configuration allows the flexibility of efficient high power operation and low input current during system sleep modes.
Features http://onsemi.com MARKING DIAGRAM
9 PIN MICRO BUMP FC SUFFIX CASE 499E XXXX YYWW 1
XX = Device Code YY = Year WW = Work Week
· Synchronous Rectification for Higher Efficiency in PWM Mode · Pulsed Switching Mode Operation for Low Current Consumption at · · · · · · · · · · · · · · ·
Low Loads Integrated MOSFETs and Feedback Circuits Cycle - by - Cycle Current Limit Automatic Switching Between PWM, with External or Internal Oscillator, and Pulsed Mode Operating Frequency Range of 450 to 1000 kHz Internal 1.0 MHz Oscillator Thermal Limit Protection Built - in Slope Compensation for Current Mode PWM Converter 1.0, 1.3, 1.5, 1.89 Fixed Output Voltages Shutdown Current Consumption of 0.2 mA Pb Free Package for Green Manufacturing Cellular Phones and Pagers PDA Digital Cameras Supplies for DSP Cores Portable Applications
A1
PIN CONNECTIONS
Pin: A1. - GNDP A2. - LX A3. - VCC B1. - SYNC B2. - GNDA B3. - FB C1. - SHD C2. - CB1 C3. - CB0
B1
C1
A2
B2
C2
A3
B3
C3
(Bottom View)
ORDERING INFORMATION
Device NCP1511FCT1G Package 9 Pin Pb Free Micro Bump Shipping TBD
Applications
This document contains information on a new product. Specifications and information herein are subject to change without notice.
© Semiconductor Components Industries, LLC, 2003
1
June, 2003 - Rev. 2
Publication Order Number: NCP1511/D
NCP1511
Shutdown Sync NCP1511 CB0 CB1 Vbat
Vout
L 6.8 mH Cout 10 m Cin 10 m
Figure 1. Applications Circuit
VCC Vin
Q1
LX
L
FB Vout
Cin
Low Iq Pulsed Cntrl
Cout PWM/ PFM Cntrl Q2
Control
GNDP Sync CB0 CB1 SHD
GNDA
Figure 2. Block Diagram
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2
NCP1511
PIN FUNCTION DESCRIPTION
Pin No. A1 A2 A3 B1 Symbol GNDP LX VCC SYNC Type Power Ground Analog Output Analog Input Analog Input Description Ground Connection for the NFET Power Stage. Connection from Power Pass Elements to the Inductor. Power Supply Input for Power and Analog VCC. Synchronization input for the PWM converter. If a clock signal is present, the converter uses the rising edge for the turn on. If this pin is low, the converter is in the Pulsed mode. If this pin is high, the converter uses the internal oscillator for the PWM mode. This pin contains an internal pull down resistor. Ground connection for the Analog Section of the IC. This is the GND for the FB, Ref, Sync, CB, and SHD pins. Feedback Voltage from the Output of the Power Supply. Enable for Switching Regulator. This Pin is Active High to enable the NCP1511. The SHD Pin has an internal pull down resistor to force the converter off if this pin is not connected to the external circuit. Selects Vout. This pin contains an internal pull up resistor. Selects Vout. This pin contains an internal pull down resistor.
B2 B3 C1
GNDA FB SHD
Analog Ground Analog Input Analog Input
C2 C3
CB1 CB0
Analog Input Analog Input
MAXIMUM RATINGS (Note 1)
Rating Maximum Voltage All Pins Maximum Operating Voltage All Pins Thermal Resistance, Junction-to-Air Operating Ambient Temperature Range ESD Withstand Voltage Moisture Sensitivity Storage Temperature Range Junction Operating Temperature 1. This device series contains ESD protection and exceeds the following tests: Human Body Model 2,000 V per MIL-STD-883, Method 3015. Machine Model Method 200 V. Human Body Model (Note 1) Machine Model (Note 1) Symbol Vmax Vmax Rja TA VESD MSL Tstg TJ Value 5.5 5.2 159 - 30 to 85 > 2500 > 100 Level 1 - 55 to 150 - 30 to 125 °C °C Unit V V °C/W °C V
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3
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