Datasheet MAX1795, MAX1796, MAX1797 (Maxim) - 4
| Fabricante | Maxim |
| Descripción | Low-Supply Current, Step-Up DC-DC Converters with True Shutdown |
| Páginas / Página | 13 / 4 — Electrical Characteristics (continued). TA = -40°C to +85°C. PARAMETER. … |
| Formato / tamaño de archivo | PDF / 2.1 Mb |
| Idioma del documento | Inglés |
Electrical Characteristics (continued). TA = -40°C to +85°C. PARAMETER. SYMBOL. CONDITIONS. MIN. MAX. UNITS. Note 1:. Note 2:. Note 3:
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MAX1795/MAX1796/ Low-Supply Current, Step-Up DC-DC Converters MAX1797 with True Shutdown
Electrical Characteristics (continued)
(VBATT = +2V, OUT = FB (VOUT = +3.3V), SHDN = LBI = GND,
TA = -40°C to +85°C
, unless otherwise noted.) (Note 3)
PARAMETER SYMBOL CONDITIONS MIN MAX UNITS
Internal NFET, PFET VOUT = +3.3V, NFET 0.3 On-Resistance RDS(ON) I Ω LX = 100mA PFET 0.45 MAX1795 0.19 0.37 LX Switch Current Limit (NFET only) ILIM MAX1796 0.35 0.7 A MAX1797 0.8 1.32 LX Leakage Current ILEAK VLX = 0 and +5.5V, VOUT = +5.5V µA Damping Switch On-Resistance RDAMP 100 400 Ω Operating Current into OUT (Note 2) VFB = +1.4V 45 µA Operating Current into BATT VFB = +1.4V, VLBI = +1V 4 µA Shutdown Current into BATT SHDN = BATT, VLBI = +1V 4 µA LX Switch Maximum On-Time tON VFB = +1V, if current limit not reached 2.75 5.25 µs LX Switch Minimum Off-Time tOFF VFB = +1V 0.7 1.3 µs V LBI Threshold Voltage V BATT = +2V 0.8 0.90 LBI V VBATT = LBI 0.875 0.975 LBI Input Current ILBI VLBI = +0.8V 100 nA VBATT = VLBI = +0.975V, sinking 20µA (50Ω typ) 0.1 LBO Low Output Voltage V VBATT = VLBI = +1.1V, sinking 100µA (25Ω typ) 0.1 LBO Off-Leakage Current VLBO = +5.5V 100 nA V 0.2 x IL VBATT SHDN Input Voltage V V 0.8 x IH VBATT Shutdown Input Current VSHDN = 0 and +5.5V 100 nA
Note 1:
Operating Voltage: Since the regulator is bootstrapped to the output, once started it will operate down to a 0.7V input.
Note 2:
Device is bootstrapped (power to IC comes from OUT). This correlates directly with the actual battery supply current.
Note 3:
Specifications to -40°C are guaranteed by design, not production tested. www.maximintegrated.com Maxim Integrated │ 4
Electrical Characteristics (continued)
(VBATT = +2V, OUT = FB (VOUT = +3.3V), SHDN = LBI = GND,
TA = -40°C to +85°C
, unless otherwise noted.) (Note 3)
PARAMETER SYMBOL CONDITIONS MIN MAX UNITS
Internal NFET, PFET VOUT = +3.3V, NFET 0.3 On-Resistance RDS(ON) I Ω LX = 100mA PFET 0.45 MAX1795 0.19 0.37 LX Switch Current Limit (NFET only) ILIM MAX1796 0.35 0.7 A MAX1797 0.8 1.32 LX Leakage Current ILEAK VLX = 0 and +5.5V, VOUT = +5.5V µA Damping Switch On-Resistance RDAMP 100 400 Ω Operating Current into OUT (Note 2) VFB = +1.4V 45 µA Operating Current into BATT VFB = +1.4V, VLBI = +1V 4 µA Shutdown Current into BATT SHDN = BATT, VLBI = +1V 4 µA LX Switch Maximum On-Time tON VFB = +1V, if current limit not reached 2.75 5.25 µs LX Switch Minimum Off-Time tOFF VFB = +1V 0.7 1.3 µs V LBI Threshold Voltage V BATT = +2V 0.8 0.90 LBI V VBATT = LBI 0.875 0.975 LBI Input Current ILBI VLBI = +0.8V 100 nA VBATT = VLBI = +0.975V, sinking 20µA (50Ω typ) 0.1 LBO Low Output Voltage V VBATT = VLBI = +1.1V, sinking 100µA (25Ω typ) 0.1 LBO Off-Leakage Current VLBO = +5.5V 100 nA V 0.2 x IL VBATT SHDN Input Voltage V V 0.8 x IH VBATT Shutdown Input Current VSHDN = 0 and +5.5V 100 nA
Note 1:
Operating Voltage: Since the regulator is bootstrapped to the output, once started it will operate down to a 0.7V input.
Note 2:
Device is bootstrapped (power to IC comes from OUT). This correlates directly with the actual battery supply current.
Note 3:
Specifications to -40°C are guaranteed by design, not production tested. www.maximintegrated.com Maxim Integrated │ 4