LTC3544B_15 Datasheet, PDF (2/18 Pages) Linear Technology – Quad Synchronous Step-Down Regulator

LTC3544B
Absolute Maximum Ratings
(Note 1)
Input Supply Voltage......................................–0.3V to 6V
RUNx.............................................. –0.3V to (V_IN + 0.3V)
V_FBx................................................ –0.3V to (V_IN + 0.3V)
SWx................................................ –0.3V to (V_IN + 0.3V)
300mA P-Channel Source Current (DC) (Note 8). 450mA
300mA N-Channel Sink Current (DC) (Note 8)...... 450mA
200mA P-Channel Source Current (DC) (Note 8).. 300mA
200mA N-Channel Sink Current (DC) (Note 8)...... 300mA
100mA P-Channel Source Current (DC) (Note 8).. 200mA
100mA N-Channel Sink Current (DC) (Note 8)...... 200mA
Peak 300mA SW Sink and Source Current
(Note 8)............................................................... 600mA
Peak 200mA SW Sink and Source Current
(Note 8)............................................................... 400mA
Peak 100mA SW Sink and Source Current
(Note 8)............................................................... 200mA
Operating Temperature Range.................. –40°C to 85°C
Junction Temperature (Notes 3, 4)......................... 125°C
Storage Temperature Range....................–65°C to 125°C
Pin Configuration
TOP VIEW
16 15 14 13
V_FB200B 1
V_FB200A 2
RUN200A 3
SW200B 4
17
GNDA
12 RUN100
11 V_FB100
10 V_FB300
9 RUN300
5678
UD PACKAGE
16-LEAD (3mm s 3mm) PLASTIC QFN
T_JMAX = 125°C, θ_JA = 68°C/W
EXPOSED PAD (PIN 17) IS ANALOG GND, MUST BE SOLDERED TO PCB
Order Information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC3544BEUD#PBF
LTC3544BEUD#TRPBF LCLN
16-Lead (3mm × 3mm) Plastic QFN
LEAD BASED FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC3544BEUD
LTC3544BEUD#TR
LCLN
16-Lead (3mm × 3mm) Plastic QFN
Consult LTC Marketing for parts specified with wider operating temperature ranges.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
TEMPERATURE RANGE
–40°C to 85°C
TEMPERATURE RANGE
–40°C to 85°C
Electrical Characteristics The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_IN = 3.6V unless otherwise noted. (Note 2)
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
General Characteristics
V_IN
V_FBREGx
Input Voltage Range
Regulated Feedback Voltage (Note 5)
l 2.25
5.5
V
0.792 0.8 0.808
V
l 0.784 0.8 0.816
V
ΔV_FBREGx
V_LOADREG
I_S
Reference Voltage Line Regulation (Note 5)
Output Voltage Load Regulation (Note 6)
Input DC Bias Current Active Mode (Pulse Skip)
V_IN = 2.25V to 5.5V
V_FB = 0.7V, I_LOAD = 0A, 2.25MHz,
Four Regulators Enabled
0.05 0.25
%/V
0.5
%
825 1100
µA
Shutdown
0.1
2
µA
f_OSC
Oscillator Frequency
V_IN = 3V
V_IN = 2.5V to 5.5V
2.25
MHz
l 1.8
2.7
MHz
3544bfb