Electrical characteristics (continued) – Rainbow Electronics MAX8805Z User Manual
Page 3
MAX8805Y/MAX8805Z
600mA PWM Step-Down Converters in
2mm x 2mm WLP for WCDMA PA Power
_______________________________________________________________________________________
3
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
LX
p-channel MOSFET switch, I
LX
= -40mA
0.18
0.6
On-Resistance
n-channel MOSFET rectifier, I
LX
= 40mA
0.15
0.6
Ω
T
A
= +25°C
0.1
5
LX Leakage Current
V
IN1A
= V
IN1B
= V
IN2
= 5.5V,
V
LX
= 0V
T
A
= +85°C
1
µA
p-Channel MOSFET Peak
Current Limit
V
LX
= 0V
0.7
0.9
1.1
A
n-Channel MOSFET Valley
Current Limit
0.5
0.7
0.9
A
Minimum On- and Off-Times
0.1
µs
Power-Up Delay
From PA_EN rising to LX rising
150
250
µs
BYPASS
T
A
= +25°C
0.060
0.1
On-Resistance
p-channel MOSFET bypass,
I
OUT
= -90mA
T
A
= +85°C
0.1
Ω
Bypass Current Limit
V
PA
= 0
0.8
1.2
1.8
A
S tep - D ow n C ur r ent Li m i t i n Byp ass
V
LX
= 0
0.7
0.9
1.1
A
Total Bypass Current Limit
V
LX
= V
PA
= 0
1.5
2.1
2.9
A
T
A
= +25°C
0.01
10
Bypass Off-Leakage Current
V
IN1A
= V
IN1B
= V
IN2
= 5.5V,
V
PAA
= V
PAB
= 0V
T
A
= +85°C
1
µA
LDO1
MAX8805YEWEAA+T
1.746
1.8
1.854
MAX8805YEWEBC+T
2.425
2.5
2.575
MAX8805YEWECC+T
2.619
2.7
2.781
MAX8805YEWEDD+T
2.716
2.8
2.884
MAX8805YEWEEE+T
2.765
2.85
2.936
Output Voltage V
LDO1
V
IN2
= 5.5V, I
LDO1
= 1mA;
V
IN2
= 3.4V, I
LDO1
= 100mA
MAX8805YEWEGG+T
2.910
3.0
3.090
V
Output Current
200
mA
Current Limit
V
LDO1
= 0V
250
550
750
mA
Dropout Voltage
I
LDO1
= 100mA, T
A
= +25°C (V
LDO1
≥ 2.5V)
70
200
mV
Line Regulation
V
IN2
stepped from 3.5V to 5.5V, I
LDO1
= 100mA
2.4
mV
Load Regulation
I
LDO1
stepped from 50µA to 200mA
25
mV
Power-Supply Rejection
ΔV
LDO1
/
ΔV
IN2
10Hz to 10kHz, C
LDO1
= 1µF, I
LDO1
= 30mA
70
dB
Output Noise
100Hz to 100kHz, C
LDO1
= 1µF, I
LDO1
= 30mA
35
µV
RMS
0 < I
LDO1
< 10mA
100
nF
Output Capacitor for Stable
Operation
0 < I
LDO1
< 200mA
1
µF
Shutdown Output Impedance
V
EN1
= 0V
1
k
Ω
ELECTRICAL CHARACTERISTICS (continued)
(V
IN1A
= V
IN1B
= V
IN2
= V
PA_EN
= V
EN1
= V
EN2
= 3.6V, V
HP
= 0V, V
REFIN
= 0.9V, T
A
= -40°C to +85°C. Typical values are at T
A
=
+25°C, unless otherwise noted.) (Note 1)