Rainbow Electronics MAX8668 - Manual (Page 2)

MAX8667/MAX8668
1.5MHz Dual Step-Down DC-DC Converters
with Dual LDOs and Individual Enables
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V IN34 = V IN12 = 3.6V, T A = -40°C to +85°C, unless otherwise noted. Typical values are at T A = +25°C.) (Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
IN12, IN34, FB1, FB2, EN1, EN2, EN3, EN4, OUT1,
OUT2, REF to GND............................................-0.3V to +6.0V
OUT3,
OUT4 to GND.....-0.3V to the lesser of + 6V or (VIN34 + 0.3V)
PGND1, PGND2 to GND .......................................-0.3V to +0.3V
LX1, LX2 Current ..........................................................1.5A RMS
LX1, LX2 to GND (Note 1) .......................-0.3V to (VIN12 + 0.3V)
Continuous Power Dissipation (TA = +70°C)
16-Pin, 3mm x 3mm Thin QFN
(derate 20.8mW/°C above +70°C) .............................1667mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ..................................................... +150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER CONDITIONS MIN TYP MAX UNITS
IN34 Supply Range V IN12
≥ V
IN34 1.7 5.5 V
IN12 Supply Range MAX8668, V IN12
≥ V
IN34 2.6 5.5 V
IN12 Suppy Range MAX8667, V IN12
≥ V
IN34 2.8 5.5 V
T A = +25°C 1 µA Shutdown Supply Current,
I
IN12 + I IN34
V IN12 = V IN34 = 4.2V V EN_ = 0V
T A = +85°C 0.05 µA
No Load Supply Current,
I
IN12 + I IN34
MAX8667ETEJS+, all regulators enabled 100 150 µA
UNDERVOLTAGE LOCKOUT
V IN12 rising 2.4 2.5 2.6 V
IN12 UVLO
V IN12 hysteresis 0.1 V
V IN34 rising 1.5 1.6 1.7 V
IN34 UVLO
V IN34 hysteresis 0.1 V
THERMAL SHUTDOWN
Threshold T A rising +160 °C
Hysteresis 15 °C
REFERENCE
Reference Bypass Output
Voltage
0.591 0.600 0.609 V
REF Supply Rejection 2.6V ≤ (V
IN12 = V IN34 ) ≤ 5.5V 0.15 mV/V
LOGIC AND CONTROL INPUTS
EN_ Input Low Level
1.7V ≤ V
IN34
≤ 5.5V
2.6V ≤ V
IN12
≤ 5.5V
0.4 V
EN_ Input High Level
1.7V ≤ V
IN34
≤ 5.5V
2.6V ≤ V
IN12
≤ 5.5V
1.44 V
T A = +25°C -1 +1
EN_ Input Leakage Current V IN12 = V IN34 = 5.5V
T A = +85°C 0.001
µA
STEP-DOWN CONVERTERS
Minimum Adjustable Output
Voltage
MAX8668 0.6 V
Note 1: LX_ has internal clamp diodes to GND and IN12. Applications that forward bias these diodes should take care not to exceed
the IC’s package-dissipation limits.