LTC3407EDD-2 Linear Technology, LTC3407EDD-2 Datasheet - Page 5

• Manufacturer Part Number: LTC3407EDD-2
• Description: IC REG DC/DC DUAL STEPDOWN 10DFN
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LTC3407EDD-2

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: 0.6 ~ 5 V
• Current - Output: 1A
• Frequency - Switching: 1.5MHz
• Voltage - Input: 2.5 ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-DFN
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

TYPICAL PERFORMANCE CHARACTERISTICS
PIN FUNCTIONS
V
age from the external resistive divider across the output.
Nominal voltage for this pin is 0.6V.
RUN1 (Pin 2): Regulator 1 Enable. Forcing this pin to V
enables regulator 1, while forcing it to GND causes regulator
1 to shut down. This pin must be driven; do not fl oat.
V
to GND.
SW1 (Pin 4): Regulator 1 Switch Node Connection to the
Inductor. This pin swings from V
GND (Pin 5): Ground. This pin is not connected internally.
Connect to PCB ground for shielding.
MODE/SYNC (Pin 6): Combination Mode Selection and
Oscillator Synchronization. This pin controls the opera-
tion of the device. When tied to V
operation or pulse-skipping mode is selected, respectively.
Do not fl oat this pin. The oscillation frequency can be
FB1
IN
100
(Pin 3): Main Power Supply. Must be closely decoupled
95
90
85
80
75
70
65
60
(Pin 1): Output Feedback. Receives the feedback volt-
Effi ciency vs Load Current
1
V
Burst Mode OPERATION
NO LOAD ON OTHER CHANNEL
CIRCUIT OF FIGURE 1
OUT
4.2V
2.7V
= 1.2V
LOAD CURRENT (mA)
10
3.6V
100
3407 G13
IN
IN
1000
to GND.
or GND, Burst Mode
100
95
90
85
80
75
70
65
60
Effi ciency vs Load Current
1
V
Burst Mode OPERATION
NO LOAD ON OTHER CHANNEL
CIRCUIT OF FIGURE 1
OUT
2.7V
= 1.5V
LOAD CURRENT (mA)
IN
10
4.2V
3.6V
synchronized to an external oscillator applied to this pin
and pulse-skipping mode is automatically selected.
SW2 (Pin 7): Regulator 2 Switch Node Connection to the
Inductor. This pin swings from V
POR (Pin 8): Power-On Reset . This common-drain logic
output is pulled to GND when the output voltage is not
within ±8.5% of regulation and goes high after 117ms
when both s are within regulation.
RUN2 (Pin 9): Regulator 2 Enable. Forcing this pin to V
enables regulator 2, while forcing it to GND causes regulator
2 to shut down. This pin must be driven; do not fl oat.
V
voltage from the external resistive divider across the output.
Nominal voltage for this pin is 0.6V.
Exposed Pad (GND) (Pin 11): Power Ground. Connect to
the (–) terminal of C
connected to electrical ground on PCB.
FB2
100
(Pin 10): Output Feedback. Receives the feedback
3407 G14
T
A
1000
= 25°C unless otherwise specifi ed.
OUT
–0.1
–0.2
–0.3
–0.4
–0.5
0.5
0.4
0.3
0.2
0.1
, and (–) terminal of C
0
Line Regulation
2
V
I
T
OUT
A
OUT
= 25°C
= 200mA
= 1.8V
3
IN
to GND.
LTC3407-2
V
IN
4
(V)
IN
. Must be
5
3407 G15
34072fc
5
IN
6