LTC3822-1_15 Datasheet, PDF (2/24 Pages) Linear Technology – No RSENSE, Low Input Voltage, Synchronous Step-Down DC/DC Controller

LTC3822-1
ABSOLUTE MAXIMUM RATINGS (Note 1)
Input Supply Voltage (V_IN) ........................ –0.3V to 4.5V
BOOST Voltage .......................................... –0.3V to 10V
PLLLPF, RUN, IPRG, SYNC/MODE,
TRACK/SS Voltages .......................–0.3V to (V_IN + 0.3V)
V_FB, I_TH Voltages ....................................... –0.3V to 2.4V
SW Voltage ............................................ –2V to V_IN + 1V
Operating Temperature Range (Note 2) ... –40°C to 85°C
Storage Ambient Temperature Range
DD ..................................................... –65°C to 125°C
GN ..................................................... –65°C to 150°C
Junction Temperature (Note 3) ............................. 125°C
Lead Temperature (Soldering, 10 sec)
GN Only ............................................................ 300°C
PACKAGE/ORDER INFORMATION
TOP VIEW
PLLLPF 1
SYNC/MODE 2
TRACK/SS 3
V_FB 4
I_TH 5
RUN 6
12 SW
11 V_IN
13
10 BOOST
9 TG
8 BG
7 IPRG
DD PACKAGE
12-LEAD (3mm × 3mm) PLASTIC DFN
T_JMAX = 125°C, θ_JA = 43°C/W
EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB
ORDER PART NUMBER
DD PART MARKING
TOP VIEW
GND 1
PLLLPF 2
SYNC/MODE 3
PGOOD 4
TRACK/SS 5
V_FB 6
I_TH 7
RUN 8
16 SW
15 SENSE^–
14 V_IN
13 BOOST
12 TG
11 BG
10 IPRG
9 GND
GN PACKAGE
16-LEAD PLASTIC SSOP
T_JMAX = 125°C, θ_JA = 110°C/W
ORDER PART NUMBER
GN PART MARKING
LTC3822EDD-1
LCMS
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
LTC3822EGN-1
38221
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_IN = 3.3V unless otherwise noted.
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Main Control Loops
V_IN
Input DC Supply Current
Normal Operation
Sleep Mode
Shutdown
UVLO
Undervoltage Lockout Threshold
Shutdown Threshold Of RUN Pin
Operating Voltage Range
(Note 4)
RUN = 0
V_IN = UVLO Threshold – 200mV
V_IN Falling
V_IN Rising
2.75
3.3
4.5
V
360
525
µA
105
150
µA
7.5
20
µA
10
20
● 1.95 2.25 2.55
V
● 2.15 2.45 2.75
V
0.7
1.1
1.4
V
Regulated Feedback Voltage
(Note 5)
● 0.594 0.6 0.606
V
Output Voltage Line Regulation
2.75V < V_IN < 4.5V (Note 5)
0.025 0.1
%/V
38221f
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