LTC3568_15 Datasheet, PDF (2/18 Pages) Linear Technology – 1.8A, 4MHz, Synchronous Step-Down DC/DC Converter

LTC3568
Absolute Maximum Ratings
(Note 1)
PV_IN, SV_IN Voltages...................................... –0.3V to 6V
V_FB, I_TH, SHDN/R_T Voltages.......... –0.3V to (V_IN + 0.3V)
SYNC/MODE Voltage..................... –0.3V to (V_IN + 0.3V)
SW Voltage.................................... –0.3V to (V_IN + 0.3V)
PGOOD Voltage............................................ –0.3V to 6V
Operating Junction Temperature Range
(Note 2).............................................. –40°C to 125°C
Junction Temperature (Notes 5, 8)........................ 125°C
Storage Temperature Range................... –65°C to 125°C
Pin Configuration
TOP VIEW
SHDN/R_T 1
SYNC/MODE 2
SGND 3
SW 4
PGND 5
10 I_TH
9 V_FB
11
8 PGOOD
7 SV_IN
6 PV_IN
DD PACKAGE
10-LEAD (3mm s 3mm) PLASTIC DFN
T_JMAX = 125°C, θ_JA = 43°C/W, θ_JC = 3°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
Order Information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3568EDD#PBF
LTC3568EDD#TRPBF
LCSG
10-Lead (3mm × 3mm) Plastic DFN
–40°C to 125°C
LTC3568IDD#PBF
LTC3568IDD#TRPBF
LCSG
10-Lead (3mm × 3mm) Plastic DFN
–40°C to 125°C
LEAD BASED FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3568EDD
LTC3568EDD#TR
LCSG
10-Lead (3mm × 3mm) Plastic DFN
–40°C to 125°C
LTC3568IDD
LTC3568IDD#TR
LCSG
10-Lead (3mm × 3mm) Plastic DFN
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
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/
Electrical Characteristics The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_IN = 3.3V, R_T = 324k unless otherwise specified. (Note 2)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V_IN
Operating Voltage Range
I_FB
Feedback Pin Input Current
V_FB
Feedback Voltage
(Note 3)
LTC3568E (Note 3)
LTC3568I (Note 3)
2.25
5.5
V
±0.1
µA
l 0.784
0.8
0.816
V
l 0.780
0.8
0.816
V
ΔV_LINEREG
Reference Voltage Line Regulation
V_IN = 2.25V to 5V
ΔV_LOADREG Output Voltage Load Regulation
I_TH = 0.36, (Note 3)
l
I_TH = 0.84, (Note 3)
l
g_m(EA)
Error Amplifier Transconductance
I_TH Pin Load = ±5µA (Note 3)
I_S
Input DC Supply Current (Note 4)
Active Mode
V_FB = 0.75V, SYNC/MODE = 3.3V
Sleep Mode
V_SYNC/MODE = 3.3V, V_FB = 1V
Shutdown
V_SHDN/RT = 3.3V
V_SHDN/RT
Shutdown Threshold High
Active Oscillator Resistor
0.04
0.2
%/V
0.02
0.2
%
–0.02
–0.2
%
800
µS
240
350
µA
62
100
µA
0.1
1
µA
V_IN – 0.6 V_IN – 0.4
V
324k
1M
Ω
3568fa