Ax5510芯片数据手册

Units V V mV V μA μA V nA % % KHz V uA μA A mΩ V V mV μA % µA °C
LX
TDFN-10L (3*3) TOP View
2/16
Axelite Confidential Materials, do not copy or distribute without written consent. Rev.1.4 Oct.18, 2011
AX5510A
ORDER/MARKING INFORMATION Order Information
AX5510A 680K/1.2MHz, High Voltage, Boost Converter
GENERAL DESCRIPTION The AX5510A is a high performance, high efficiency step up DC-DC Converter with integrated 2A. The AX5510A converter input voltage ranging from 2.6 to 5.5V. The Output voltage can be set up to 27V. The selectable frequency of 680 kHz and 1.2 MHz allows the use of small external inductors and capacitors and provides fast transient response. Current mode control with external compensation network makes it easy to stabilize the system and keep maximum flexibility. Programmable soft start function minimizes impact on the input power system. Internal power MOSFET with very low RDS(ON) provides high efficiency. The AX5510A automatically transits from PWM to PFM during light load condition further increasing efficiency. The converter also provides protection functions such as Current Limit and Thermal shutdown. The AX5510A is available in space-saving MSOP-10L-EP, MOSP-8L-EP, TDFN-10L and SOP-8L-EP packages. FEATURES 2.6V to 5.5V operating input voltage range Adjustable output voltage range up to 27V Up to 2A output switch current 680K/1.2MHz Selectable Switching Frequency Programmable soft-start function External Compensation Network Current limit and Thermal shutdown protection Under voltage Lockout ≤ 1µA Shutdown Current Available in the Pb-Free MSOP-10L-EP, MSOP-8L-EP ,TDFN-10L and SOP-8L-EP Packages
AX 5 5 1 0 A Y Y W WX
Part number ID code: internal WW: 01~52 Year: 10=2010 11=2011
5 5 1 0A Y Y W WX
Part number ID code: internal WW: 01~52 Year: 10=2010 11=2011
Unit V V V mW °C °C °C/W
°C/W
Note: θJA is measured with the PCB copper area of approximately 1.5 in2(Multi-layer). That copper area needs connect to exposed pad.
wenku.baidu.com
AX5510A
ABSOLUTE MAXIMUM RATINGS (at TA=25°C) Characteristics Symbol Rating VCC Pin Voltage VCC GND - 0.3 to GND + 6 EN, FREQ,COMP,FB,SS, Pin Voltage GND - 0.3 to VCC + 0.3 LX Pin Voltage VLX 30 Power Dissipation PD ( TJ-TA ) / θJA Storage Temperature Range TST -65 to +150 Operating Junction Temperature Range TOP -40 to +125 30 MSOP-8/10L-EP Thermal Resistance from 20 TDFN-10L θJC Junction to case 15 SOP-8L-EP 80 MSOP-8/10L-EP Thermal Resistance from 55 TDFN-10L θJA Junction to ambient 40 SOP-8L-EP
Typ 2.35 -150 150 0.1 1.238 0.01 0.2 0.15 1200 680 7 2.5 200 160 200 0.01 90 150 35
Max 5.5 2.6 27 250 1 1.257 +100 1500 850 0.5 0.1 13 280 220 0.4 0.1 10 -
1 2 3 4 5 10
( Top View )
SS FREQ VCC LX LX
COMP FB EN GND
1 2 3 4 SOP/MSOP-8L-EP Exposed AX Pad (GND)
8 SS 7 FREQ 6 VCC 5 LX
Exposed Pad (SGND)
9 8 7 6
MSOP-10L-EP
AX5510A XXX X
Package Type Packing Blank : Tube ES: SOP-8L-EP EU: MSOP-10L-EP A: Taping EU8: MSOP-8L-EP J10: TDFN-10L (3*3)
Top Marking (MSOP/SOP)
Logo
Top Marking (TDFN-10L)
BLOCK DIAGRAM
VCC 7uA SS FB COMP
Error Amplifier Summing Comparator
Soft Start
1.238V Reference
Thermal Shutdown
Enable/ Disable
EN
LX Control and Driver Logic
N-MOS
FREQ SGND
Oscillator PGND
Slope Compensation
Current Sense
1/16
Axelite Confidential Materials, do not copy or distribute without written consent. Rev.1.4 Oct.18, 2011
COMP 1 FB 2 EN 3 SGND 4 PGND 5 Exposed Pad
(SGND)
10 9
SS
FREQ 8 VCC 7 LX
6
Name Description VCC Power Input pin EN Enable Pin COMP Compensation Pin FB Feedback Pin Soft start Pin. Connect a capacitor to SS GND GND Ground Pin SGND Signal Ground PGND Power Ground LX Switch Output Pin Frequency select pin. The power switch operates at 680kHz if FREQ is FREQ connected to GND and at 1.2MHz if FREQ is connected to VCC
AX5510A
PIN ASSIGNMENT The packages of AX5510A are MSOP-10L-EP, TDFN-10L, SOP-8L-EP and MSOP-8L-EP; the pin assignment is given by:
( Top view ) COMP FB EN SGND PGND
3/16
Axelite Confidential Materials, do not copy or distribute without written consent. Rev.1.4 Oct.18, 2011
AX5510A
ELECTRICAL CHARACTERISTICS (VIN=5V, VOUT=12V, VEN=VIN, TA=25°C, unless otherwise noted) Characteristics Symbol Conditions Min Input Voltage range VCC 2.6 Under Voltage Lockout UVLO Rising UVLO Hysteresis Step-Up Voltage Adjust Range VOUT VCC+0.5 Operating quiescent current ICCQ IOUT= 0mA, VFB=1.5V Shutdown current ISD VEN=0V Feedback Voltage VFB 1.219 FB Input Leakage Current IFB-LKG VFB = 1.5V -100 VIN=2.6 to 5.5V Line Regulation IOUT=20mA VIN=5V Load Regulation IOUT= 1mA to 0.4A FREQ=High 900 Oscillator frequency FOSC FREQ=Low 500 FREQ high-level input voltage VFQ-IH 2 FREQ low-level input voltage VFQ-IL FREQ input leakage current IFQ-LKG FREQ=GND Soft Start Current ISS 4 N-channel MOSFET current limit ILIM Duty=40% 2 VIN=3V, ISW=1A MOSFET on-resistance RDS(on) (Note) VIN=5V, ISW=1A EN high-level input voltage VIH 1.0 EN low-level input voltage VIL EN Hysteresis hys EN input leakage current IEN-LKG VEN=GND or VIN Maximum Duty Cycle Duty VFB=0V 85 LX Leakage Current ILXL VLX = 25V, VFB=1.5V Thermal Shutdown TSD Thermal Shutdown Hysteresis Note：Guaranteed by design.