参数资料
型号: LTC3407AIDD#PBF
厂商: LINEAR TECHNOLOGY CORP
元件分类: 稳压器
英文描述: DUAL SWITCHING CONTROLLER, PDSO10
封装: 3 X 3 MM, LEAD FREE, PLASTIC, MO-229WEED-2, DFN-10
文件页数: 12/16页
文件大小: 283K
代理商: LTC3407AIDD#PBF
LTC3407A
5
3407afa
Efciency vs Load Current
Load Regulation
TYPICAL PERFORMANCE CHARACTERISTICS
Efciency vs Load Current
Line Regulation
TA = 25°C unless otherwise specied.
VFB1 (Pin 1): Output Feedback. Receives the feedback volt-
age from the external resistive divider across the output.
Nominal voltage for this pin is 0.6V.
RUN/SS1 (Pin 2): Regulator 1 Enable and Soft-Start Input.
Forcing this pin to VIN enables regulator 1, while forcing it
to GND causes regulator 1 to shut down. Connect external
RC-network with desired time-constant to enable soft-start
feature. This pin must be driven; do not oat.
VIN (Pin 3): Main Power Supply. Must be closely decoupled
to GND.
SW1 (Pin 4): Regulator 1 Switch Node Connection to the
Inductor. This pin swings from VIN to GND.
GND (Pin 5): Main Ground. Connect to the (–) terminal
of COUT, and (–) terminal of CIN.
MODE/SYNC (Pin 6): Combination Mode Selection and
Oscillator Synchronization. This pin controls the opera-
tion of the device. When tied to VIN or GND, Burst Mode
operation or pulse skipping mode is selected, respectively.
Do not oat this pin. The oscillation frequency can be
synchronized to an external oscillator applied to this pin
and pulse skipping mode is automatically selected.
PIN FUNCTIONS
LOAD CURRENT (mA)
1
0
EFFICIENCY
(%)
30
20
10
70
60
50
40
100
90
80
10
100
1000
3407A G11
2.7V
VOUT = 2.5V Burst Mode OPERATION
CIRCUIT OF FIGURE 3
3.3V
4.2V
LOAD CURRENT (mA)
1
0
EFFICIENCY
(%)
30
20
10
70
60
50
40
100
90
80
10
100
1000
3407A G12
Burst Mode OPERATION
PULSE SKIP MODE
VIN = 3.6V, VOUT = 1.8V
NO LOAD ON OTHER CHANNEL
LOAD CURRENT (mA)
1
–4
V
OUT
ERROR(%)
–3
1
0
–1
–2
4
3
2
10
100
1000
3407A G13
Burst Mode OPERATION
PULSE SKIP MODE
VIN = 3.6V, VOUT = 1.8V
NO LOAD ON OTHER CHANNEL
LOAD CURRENT (mA)
1
0
EFFICIENCY
(%)
30
20
10
70
60
50
40
100
90
80
10
100
1000
3407A G14
2.7V
4.2V
VOUT = 1.2V Burst Mode OPERATION
3.3V
LOAD CURRENT (mA)
1
0
EFFICIENCY
(%)
30
20
10
70
60
50
40
100
90
80
10
100
1000
3407A G15
2.7V
4.2V
3.3V
VOUT = 1.5V Burst Mode OPERATION
VIN (V)
2
V
OUT
ERROR
(%)
0.5
0.4
0.3
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
–0.5
4
6
3407A G16
35
VOUT = 1.8V
IOUT = 200mA
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