PDF《LTC3526L/LTC3526LB》

40 EFFICIENCY (%) POWER LOSS (mW)

50 60

70 80 0.1

1 10

100 1000 3526l G01

30 20

10 0

90 100

1 10

100 0.1 0.01

1000 VIN = 1.0V VIN = 1.2V VIN = 1.5V PLOSS AT VIN = 1.0V PLOSS AT VIN = 1.2V PLOSS AT VIN = 1.5V LOAD CURRENT (mA) 0.01

40 EFFICIENCY (%) POWER LOSS (mW)

50 60

70 80 0.1

1 10

100 1000 3526l G02

30 20

10 0

90 100

1 10

100 0.1 0.01

1000 VIN = 1.2V VIN = 1.8V VIN = 2.4V VIN = 3.0V PLOSS AT VIN = 1.2V PLOSS AT VIN = 1.8V PLOSS AT VIN = 2.4V PLOSS AT VIN = 3.0V VIN (V) 0.5 I IN (?A)

60 70

80 4.5 3526l G04

50 40

10 1.5 2.5 3.5 1.0 2.0 3.0 4.0

30 20

100 90 VOUT = 3.3V VOUT = 5V VOUT = 2.5V VOUT = 1.8V LOAD CURRENT (mA) 0.01

40 EFFICIENCY (%) POWER LOSS (mW)

50 60

70 80 0.1

1 10

100 1000 3526l G03

30 20

10 0

90 100

1 10

100 0.1 0.01

1000 VIN = 1.2V VIN = 2.4V VIN = 3.6V VIN = 4.2V PLOSS AT VIN = 1.2V PLOSS AT VIN = 2.4V PLOSS AT VIN = 3.6V PLOSS AT VIN = 4.2V VIN (V) 0.5 I OUT (mA)

200 300 4.5 3526l G05

100 0 1.5 2.5 3.5 1.0 2.0 3.0 4.0

400 150

250 50

350 VOUT = 3.3V VOUT = 5V VOUT = 2.5V VOUT = 1.8V L = 4.7?H VIN (V) 0.65 LOAD (Ω)

100 1000

10000 1.05 0.95 0.75 1.15 0.85 3526l G06

10 VOUT = 3.3V ELECTRICAL CHARACTERISTICS Typical Performance Characteristics LTC3526L/LTC3526LB 3526lfc C50 C30 C10

10 30

50 70

90 TEMPERATURE (°C) NORMALIZED R DS(ON) 1.0 1.1 1.2 3526l G12 0.8 0.7 1.3 0.9 NORMALIZED TO 25°C Start-Up Delay Time vs VIN Burst Mode Threshold Current vs VIN (LTC3526L) Oscillator Frequency Change vs VOUT RDS(ON) vs VOUT Oscillator Frequency Change vs Temperature RDS(ON) Change vs Temperature VIN (V) 1.0

0 DELAY (?s)

10 30

40 50

100 70 2.0 3.0 3.5 3526l G07

20 80

90 60 1.5 2.5 4.0 4.5 VIN (V) 1.0

0 LOAD CURRENT (mA)

5 10

15 20

25 30 1.25 1.5 3526l G08a ENTER BURST LEAVE BURST VOUT = 1.8V COUT = 10?F L = 4.7?H Burst Mode Threshold Current vs VIN (LTC3526L) VIN (V) 1.0 LOAD CURRENT (mA)

15 20

25 3526l G08b

10 5

0 1.25 1.5

30 2.0 1.75 ENTER BURST LEAVE BURST VOUT = 2.5V COUT = 10?F L = 4.7?H Burst Mode Threshold Current vs VIN (LTC3526L) Burst Mode Threshold Current vs VIN (LTC3526L) VIN (V) 1.0

0 LOAD CURRENT (mA)

5 15

20 25

35 1.5 2.0 3526l G08c

10 40

30 2.5 3.0 ENTER BURST LEAVE BURST VOUT = 3.3V COUT = 10?F L = 4.7?H VIN (V) 1.0 LOAD CURRENT (mA)

40 50 2.5 3.5 3526l G08d

30 20 1.5 2.0 3.0 4.0 4.5

10 0 ENTER BURST LEAVE BURST VOUT = 5V COUT = 10?F L = 4.7?H VOUT (V) 1.5 FREQUENCY CHANGE (%)

1 2

3 3.0 4.0 3526l G09

0 C1 2.0 2.5 3.5 4.5 5.0 C2 C3 NORMALIZED TO VOUT = 3.3V VOUT (V) 1.5 R DS(ON) (Ω) 0.50 0.45 0.80 0.85 0.90 2.5 3.5 4.0 3526l G10 0.35 0.70 0.60 0.40 0.75 0.30 0.65 0.55 2.0 3.0 4.5 5.0 PMOS NMOS C50 C30 C10

10 30

50 70

90 TEMPERATURE (°C) FREQUECNY CHANGE (%)

4 6

8 3526l G11

0 C10 C8 C6

10 2 C2 C4 NORMALIZED TO 25°C TYPICAL PERFORMANCE CHARACTERISTICS LTC3526L/LTC3526LB 3526lfc TEMPERATURE (°C) C50 0.50 V IN (V) 0.55 0.60 0.65 0.70 0.80

25 0

25 50 3526l G14

75 100 0.75 1mA LOAD NO LOAD VFB vs........