MAX1586A/MAX1586B/MAX1587A
High-Efficiency, Low-I
Q
PMICs with
Dynamic Core for PDAs and Smart Phones
_______________________________________________________________________________________ 3
MIN TYP MAX
0.18 0.3
P-Channel On-Resistance
I
LX1
= -180mA, V
PV1
= 2.6V
0.21 0.35
0.13 0.225
N-Channel On-Resistance
I
LX1
= 180mA, V
PV1
= 2.6V
0.15 0.25
Ω
Current-Sense Transresistance
0.5
V/A
P-Channel Current-Limit Threshold
-1.55 -1.80 -2.10
A
PWM Skip-Mode Transition Load
Current
Decreasing load current (Note 2) 30 mA
OUT1 Maximum Output Current 2.6V ≤ V
PV1
≤ 5.5V (Note 3)
1.20
A
LX1 Leakage Current V
PV1
= 5.5V, LX1 = GND or PV1, V
ON1
= 0V
-20 +0.1 +20
µA
SYNCHRONOUS-BUCK PWM REG2
FB2 = GND, 3.6V ≤ V
PV2
≤ 5.5V, load = 0 to 900mA
2.463 2.5 2.537
MAX1586A, MAX1587A, FB2 = IN, 3.6V ≤ V
PV2
≤ 5.5V,
load = 0 to 900mA
1.773 1.8 1.827
REG2 Voltage Accuracy
MAX1586B, FB2 = IN, 3.6V ≤ V
PV2
≤ 5.5V,
load = 0 to 900mA
3.25 3.3 3.35
V
FB2 Voltage Accuracy
FB2 used with external resistors, 3.6V ≤ V
PV2
≤ 5.5V,
load = 0 to 900mA
1.231 1.25 1.269
V
FB2 Input Current FB2 used with external resistors, V
FB2
= 1.25V
100
nA
Error-Amplifier Transconductance Referred to FB 87 µS
Dropout Voltage Load = 900mA (Note 1)
243 380
0.225 0.375
P-Channel On-Resistance
I
LX2
= -180mA, VPV2 = 2.6V
0.26 0.425
0.15 0.25
N-Channel On-Resistance
I
LX2
= 180mA, VPV2 = 2.6V
0.17 0.275
Ω
Current-Sense Transresistance
0.75
V/A
P-Channel Current-Limit Threshold
-1.1 -1.275 -1.50
A
PWM Skip-Mode Transition Load
Current
Decreasing load current (Note 2) 30 mA
OUT2 Maximum Output Current 2.6V ≤ V
PV2_
≤ 5.5V (Note 3)
0.9
A
LX2 Leakage Current V
PV2_
= 5.5V, LX2 = GND or PV2, V
ON2
= 0V
-10 +0.1 +10
µA
SYNCHRONOUS-BUCK PWM REG3
REG3 from 1.3V to 1.475V, 2.6V ≤ V
PV3
_ ≤ 5.5V,
load = 0 to 400mA
-1.5 +1.5
REG3 Output Voltage Accuracy
REG3 from 0.70V to 1.275V, 2.6V ≤ V
PV3
_≤ 5.5V,
load = 0 to 500mA
-2
+2
%
Error-Amplifier Transconductance 68 µS
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 3.6V, V
BKBT
= 3.0V, V
LBI
= 1.1V, V
DBI
= 1.35V, circuit of Figure 5, T
A
= 0°C to +85°C, unless otherwise noted. Typical values
are at T
A
= +25°C.)
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