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Maxim > Solutions > Rechargeable Hearing Aid

Power Supply

DATA SHEETS
Display Title/Parts Key Advantages
QV  PDF PMIC with Integrated Charger and Smart Power Selector for Handheld Devices
MAX8671X

Five Regulated Output Voltages and Li+ Charger with Smart Power Control that Allows a System to Operate Without a Battery
QV  PDF Low-Noise 500mA LDO Regulators in a 2mm x 2mm TDFN Package
MAX8902A, MAX8902B

Low-Noise, Low-Dropout, High-PSRR, 500mA Linear Regulators in a 2mm x 2mm TDFN Package
QV  PDF 16µA IQ, 1.2A PWM Step-Down DC-DC Converters
MAX1556, MAX1556A, MAX1557

16µA Quiescent Current, 1.2A and 600mA, Step-Down Converters are 95% Efficient at 1mA
QV  PDF Low-Input-Voltage, 500mA LDO Regulator with Active-Low RESET in SOT and TDFN
MAX1589

QV  PDF 500mA, Low-Dropout Linear Regulator in µMAX
MAX1792

0.5A LDO Has Only 130mV Dropout Voltage, Fits in 1.3W Power µMAX Package



Key Specifications:  Battery Chargers
Part Number Cell Chemistry Lithium Ion Cells Protected VIN
(V)
Charging VIN
(V)
Charge Rate Set by Max. ICHG
(A)
Charge Termination Charge Regulation Features EV Kit Oper. Temp.
(°C)
Package/Pins Smallest Available Pckg.
(mm2)
max max max w/pins
MAX8671X 
Li-Ion
Li-Polymer
1 14 6.6
Logic Input
Resistor
1 Min. Charge Current Linear
Dual USB/Adapter Input
Input Current Limit
Internal FET/Transistor
Smart Power Selector
Stand Alone
Thermal Die Regulation
Thermistor Input
Timer
USB Input
Yes -40 to +85
TQFN/40
26
See All Battery Chargers (60)

Key Specifications:  Linear Regulators
Part Number Regulators VIN
(V)
VIN
(V)
Preset VOUT
(V)
Adj. VOUT
(V)
Adj. VOUT
(V)
VDROPOUT @Rated ILOAD
(V)
Rated ILOAD
(mA)
ICC
(µA)
Low Batt./ Pwr. Fail Out POK/Reset Thresh.
(V)
Watchdog Reverse Batt. Protect. Oper. Temp.
(°C)
Package/Pins Smallest Available Pckg.
(mm2)
min max min max typ max nom max w/pins
MAX8902  1 1.7 5.5
1.5
1.8
2
2.5
3
3.1
3.3
0.6 5.3 0.05 500 120 No Vout-9% No No -40 to +125
TDFN-EP/8
4.2
MAX1792  2.5
1.5
1.8
2.5
3.3
5
1.25 5 0.13 250 - -40 to +85
µMAX-EP/8
15.3
See All Linear Regulators (152)

Key Specifications:  Multifunction PMICs
Part Number Primary Topology Monitor/Control Features DC-DC/Power Features Battery Charger Features VIN
(V)
VIN
(V)
VOUT
(V)
VOUT
(V)
Max. IOUT
(A)
Max. IOUT
(A)
Oper. Freq.
(kHz)
Package/Pins Smallest Available Pckg.
(mm2)
min max min max max w/pins
MAX8671X  Step-Down Low Batt./POK Output
Current Limit
Fixed Freq./PWM
Internal Pwr. FETs
Soft Start
Sync. Rectifier
Battery Charger
Charge Timer
Dual USB/ Adapter Input
Input Current Limit
Smart Pwr. Selector
Thermal Die Regulation
Thermistor Input
USB Input
2.6 6.6 0.6 5 0.5 0.5 2000
TQFN/40
26
See All Multifunction PMICs (83)

Key Specifications:  Step-Down Switching Regulators
Part Number VIN
(V)
VIN
(V)
VOUT
(V)
VOUT
(V)
Preset VOUT
(V)
Max. IOUT
(A)
Max. IOUT
(A)
Output Adjust. Method DC-DC Outputs Oper. Freq.
(kHz)
Package/Pins Smallest Available Pckg.
(mm2)
min max min max max w/pins
MAX1556  2.6 5.5 0.75 5.5
1.8
2.5
3.3
1.2 1.2
Preset
Resistor
1 1000
TDFN-EP/10
9.6
MAX1557 
1
1.3
1.5
0.6 0.6
TDFN-EP/10
See All Step-Down Switching Regulators (264)



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