Rainbow Electronics MAX8884Z - Manual (Page 3)

MAX8884Y/MAX8884Z
700mA DC-DC Step-Down Converters
with Dual 300mA LDO in 2mm x 2mm CSP
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PARAMETER CONDITIONS MIN TYP MAX UNITS
T
A
= +25°C 0.1 1
LX Leakage Current
V IN1A = V IN1B = V IN2 = 5.5V,
V LX = 0 T A = +85°C 1
μA
p-Channel MOSFET Peak Current
Limit
V LX = 0 0.8 1.0 1.2 A
n-Channel MOSFET Valley
Current Limit
0.6 0.8 1.0 A
MAX8884Y_ 40 n-Channel MOSFET
Zero-Crossing Threshold
MAX8884Z_ 60
mA
Minimum On-Time 0.07 μs
Minimum Off-Time 0.06 μs
Power-Up Delay From V BUCK_EN rising to V LX rising 120 250 μs
LDO1, LDO2
SEL = AGND 1.764 1.800 1.836
Output Voltage V LDO1
V IN2 = 5.5V, I LDO_ = 1mA;
V IN2 = 3.4V, I LDO_ = 100mA SEL = IN1_ 2.800
V
Output Voltage V LDO2
V IN2 = 5.5V, I LDO_ = 1mA;
V IN2 = 3.4V, I LDO_ = 100mA
2.770 2.800 2.830 V
Output Current 300 mA
Current Limit V LDO_ = 0 310 450 750 mA
Dropout Voltage I LDO_ = 100mA, T A = +25°C (V LDO_
2.5V) 70 200 mV
Line Regulation V IN2 stepped from 3.5V to 5.5V, I LDO_ = 100mA 2.4 mV
Load Regulation I LDO_ stepped from 50μA to 200mA 25 mV
Power-Supply Rejection
V
LDO_
/ V
IN2
10Hz to 100kHz, V LDO_ = 1.8V,
C
LDO_
= 2.2μF, I
LDO_
= 30mA
65 dB
Output Noise
10Hz to 100kHz, V LDO_ = 1.8V,
C LDO_ = 2.2μF, I LDO_ = 30mA
26 μV RMS
0 < I LDO_ < 10mA 0.1
10mA < I LDO_ < 200mA 1
Output Capacitor for Stable
Operation
200mA < I
LDO_
< 300mA 2.2
μF
Shutdown Output Impedance V LDO1_EN = V LDO2_EN = 0 100
Power-Up Delay From V LDO_EN rising to V LDO_ output rising 150 250 μs
REFBP
REFBP Output Voltage 0 I REFBP 1μA 1.237 1.250 1.263 V
REFBP Supply Rejection V IN2 stepped from 2.55V to 5.5V 0.2 5 mV
ELECTRICAL CHARACTERISTICS (continued)
(V IN1A = V IN1B = V IN2 = V LDO1_EN = V LDO2_EN = V BUCK_EN = 3.6V. T A = -40°C to +85°C, typical values are at T A = +25°C, unless
otherwise noted.) (Note 1)
Note 1: All devices are 100% production tested at T A = +25°C. Limits over the operating temperature range are guaranteed by
design.