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LP87702 датащи(PDF) 83 Page - Texas Instruments

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номер детали LP87702
подробное описание детали  LP87702-Q1 Dual Buck Converter and 5-V Boost With Diagnostic Functions
PDF  99 Pages
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производитель  TI [Texas Instruments]
домашняя страница  http://www.ti.com
Logo TI - Texas Instruments

LP87702 датащи(HTML) 83 Page - Texas Instruments

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9.2.4 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 9-1.
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 9-3. 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 9-4. 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 9-5. 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 9-6. Buck Output Voltage vs Load Current 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
D005
Vin=3.3V, AUTO
Vin=5.0V, AUTO
VOUT = 1 V
Figure 9-7. Buck Output Voltage vs Load Current in
AUTO Mode
Input Voltage (V)
2.7
3
3.3
3.6
3.9
4.2
4.5
4.8
5.1
5.4
5.7
0.98
0.985
0.99
0.995
1
1.005
1.01
1.015
1.02
D009
Vout=1.0V; ILOAD=2.0A
.
Figure 9-8. Buck Output Voltage vs Input Voltage in
PWM Mode
www.ti.com
LP87702-Q1
SNVSAL1C – DECEMBER 2017 – REVISED JUNE 2021
Copyright © 2021 Texas Instruments Incorporated
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Product Folder Links: LP87702-Q1



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