LT3500IDD#PBF Linear Technology, LT3500IDD#PBF Datasheet - Page 4

• Manufacturer Part Number: LT3500IDD#PBF
• Description: IC REG STP-DWN 2A 12-DFN
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LT3500IDD#PBF

• Topology: Step-Down (Buck) (1), Linear (LDO) (1)
• Function: Any Function
• Number Of Outputs: 2
• Frequency - Switching: 500kHz ~ 2.4MHz
• Voltage/current - Output 1: 0.8 ~ 38.9 V, 2A
• Voltage/current - Output 2: Adjustable, 13mA
• W/led Driver: No
• W/supervisor: No
• W/sequencer: No
• Voltage - Supply: 3 V ~ 36 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 12-DFN
• Current - Output: 2A
• Voltage - Output: 0.8 ~ 38.9 V
• Voltage - Input: 3 ~ 36 V
• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -

ELECTRICAL CHARACTERISTICS
PARAMETER
LFB Voltage
LFB Line/Load Regulation
SS to LFB Offset (V
LFB Bias Current
LDRV Dropout (V
LDRV Maximum Current
LT3500
TYPICAL PERFORMANCE CHARACTERISTICS
temperature range, otherwise specifi cations are at T
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note2: The LT3500EDD/LT3500EMSE is guaranteed to meet performance
specifi cations from 0°C to 125°C junction temperature. Specifi cations over
the –40°C to 125°C operating junction temperature range are assured by
design, characterization and correlation with statistical process controls.
The LT3500IDD/LT3500IMSE is guaranteed over the full –40°C to 125°C
operating junction temperature range. The LT3500HDD/LT3500HMSE is
guaranteed over the full –40°C to 150°C operating junction temperature
range. High junction temperatures degrade operating lifetimes. Operating
lifetime is derated at junction temperatures greater than 125°C.
Note 3: Minimum input voltage is defi ned as the voltage where internal
bias lines are regulated so that the reference voltage and oscillator remain
constant. Actual minimum input voltage to maintain a regulated output
4
0.820
0.815
0.810
0.805
0.800
0.795
0.790
0.785
0.780
–50
Feedback Voltage vs Temperature
–25
VIN
0
SS
TEMPERATURE (°C)
– V
– V
25
LDRV
LFB
50
)
)
FB
75
LFB
100
125
3500 G01
150
CONDITIONS
V
V
V
V
V
V
LDRV
VIN
SS
LFB
LDRV
LDRV
= 0.8V, V
= 3V to 40V, V
= 0.8V
1.02
0.90
1.10
1.08
1.06
1.04
1.00
0.98
0.96
0.94
0.92
= V
= 3V, I
= 0V
LFB
–50
J
R
= 25°C. V
LDRV
T
LDRV
/SYNC Voltage vs Temperature
R
–25
R
RT/SYNC
RT/SYNC
The
= 5mA
= V
LDRV
0
LFB
TEMPERATURE (°C)
l
= 90.9k
VIN
= 15k
= V
25
denotes the specifi cations which apply over the full operating
= 15V, V
LFB
50
will depend upon output voltage and load current. See Applications
Information.
Note 4: An internal power-on reset (POR) latch is set on the positive
transition of the SHDN pin through its threshold. The output of the latch
activates a current source on the SS pin which typically sinks 600μA,
discharging the SS capacitor. The latch is reset when the SS pin is driven
below the soft-start POR threshold or the SHDN pin is taken below its
threshold.
Note 5: This is the minimum voltage across the boost capacitor needed to
guarantee full saturation of the internal power switch.
Note 6: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed the maximum operating junction temperature
when overtemperature protection is active. Continuous operation above
the specifi ed maximum operating junction temperature may impair device
reliability.
75
RT/SYNC
100 125 150
= 2V, unless otherwise specifi ed.
3500 G02
3.0
2.5
1.5
1.0
2.0
0.5
l
l
l
l
0
–50
Shutdown Threshold and Minimum
Input Voltage vs Temperature
0.784
0.776
–25
MIN
0.8
90
9
MINIMUM INPUT VOLTAGE
SHUTDOWN THRESHOLD
0
TEMPERATURE (°C)
25
TYP
115
115
0.8
0.8
1.2
13
50
75
0.816
0.824
MAX
140
300
1.6
18
100
125
UNITS
3500 G03
3500fc
mV
mA
150
nA
V
V
V