LTC3522_15 Datasheet, PDF (2/20 Pages) Linear Technology – Synchronous 400mA Buck-Boost and 200mA Buck Converters

LTC3522
ABSOLUTE MAXIMUM RATINGS
(Note 1)
PV_IN1, PV_IN2 Voltage .................................... –0.3V to 6V
SW1A, SW1B, SW2 Voltage
DC............................................................ –0.3V to 6V
Pulsed < 100ns........................................... –1V to 7V
Voltage, All Other Pins ................................. –0.3V to 6V
Operating Temperature Range (Note 2) ... –40°C to 85°C
Maximum Junction Temperature (Note 5) ............ 125°C
Storage Temperature Range................... –65°C to 125°C
PIN CONFIGURATION
TOP VIEW
16 15 14 13
FB2 1
12 V_OUT1
PWM 2
GND 3
11 SW1A
17
10 SW1B
PGOOD2 4
9 PGND2
5678
UD PACKAGE
16-LEAD (3mm × 3mm) PLASTIC QFN
T_JMAX = 125°C, θ_JA = 68°C/W
EXPOSED PAD (PIN 17) IS GND AND MUST BE SOLDERED TO PCB GROUND
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC3522EUD#PBF
LTC3522EUD#TRPBF
LCRQ
16-Lead (3mm × 3mm) Plastic QFN
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based finish parts.
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
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. PV_IN1 = PV_IN2 = 3.6V, V_OUT1 = 3.3V unless otherwise noted.
PARAMETER
Input Voltage
Quiescent Current—Shutdown
Burst Mode Quiescent Current
Oscillator Frequency
SHDN1, SHDN2, PWM Input High Voltage
SHDN1, SHDN2, PWM Input Low Voltage
Power Good Outputs Low Voltage
Power Good Outputs Leakage
Buck Converter
PMOS Switch Resistance
NMOS Switch Resistance
NMOS Switch Leakage
PMOS Switch Leakage
Feedback Voltage
Feedback Input Current
Peak Current Limit
CONDITIONS
V_SHDN1 = V_SHDN2 = 0V
V_FB1 = 1.1V, V_FB2 = 0.66V, V_PWM = 0V
I_PGOOD1 = I_PGOOD2 = 1mA
V_PGOOD1 = V_PGOOD2 = 5.5V
V_SW2 = 5V, PV_IN1 = PV_IN2 = 5V
V_SW2 = 0V, PV_IN1 = PV_IN2 = 5V
(Note 4)
(Note 3)
MIN TYP MAX UNITS
● 2.4
5.5
V
●
0.01
1
μA
25
μA
● 0.8
1.07 1.33
MHz
1.4
V
0.4
V
0.02 0.1
V
0.1
10
μA
0.41
Ω
0.34
Ω
0.1
5
μA
0.1
10
μA
● 0.582 0.594 0.606
V
1
50
nA
300
400
mA
3522fa
2