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LP87702 датащи(PDF) 82 Page - Texas Instruments

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номер детали LP87702
подробное описание детали  LP87702 Dual Buck Converter and 5-V Boost With Diagnostic Functions
PDF  98 Pages
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производитель  TI [Texas Instruments]
домашняя страница  http://www.ti.com
Logo TI - Texas Instruments

LP87702 датащи(HTML) 82 Page - Texas Instruments

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8.2.4 Application Curves
Unless otherwise specified: VIN = 3.3 V, VOUT_BUCK = 1 V, VOUT_BOOST = 5 V, TA = 25°C, ƒSW-setting 4 MHz, L0 = L1 =
0.47 µH (TOKO DFE252012PD-R47M), L2 = 1 µH (TFM252012ALMA1R0), COUT_BUCK, CPOL_BUCK, and COUT_BOOST = 22
µF. Measurements are done using connections in Figure 8-1.
Output Current (A)
0.001
0.01
0.1
1
5
5
50
60
70
80
90
100
D001
Vin=3.3V, Vout=1.2V
Vin=3.3V, Vout=1.8V
Vin=5.0V, Vout=1.2V
Vin=5.0V, Vout=1.8V
.
Figure 8-3. Buck Efficiency in AUTO (PFM/PWM)
Mode
Output Current (A)
0.01
0.1
1
5
5
40
50
60
70
80
90
100
D002
Vout=1.0V, Vin=3.3V
Vout=1.2V, Vin=3.3V
Vout=1.8V, Vin=3.3V
VIN = 3.3 V
Figure 8-4. Buck Efficiency in Forced PWM Mode
Output Current (A)
0.01
0.1
1
5
5
40
50
60
70
80
90
100
D003
Vout=1.0V, Vin=5.0V
Vout=1.2V, Vin=5.0V
Vout=1.8V, Vin=5.0V
VIN = 5 V
Figure 8-5. Buck Efficiency in Forced PWM Mode
Output Current (A)
0
0.5
1
1.5
2
2.5
3
3.5
0.98
0.985
0.99
0.995
1
1.005
1.01
1.015
1.02
D004
Vin=3.3V, FPWM
Vin=5.0V, FPWM
VOUT = 1 V
Figure 8-6. Buck Output Voltage vs Load Current in
Forced PWM Mode
LP87702
SNVSBU3 – MARCH 2021
www.ti.com
82
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Copyright © 2021 Texas Instruments Incorporated
Product Folder Links: LP87702



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