Pmics with dynamic core for pdas and smart phones, Electrical characteristics (continued) – Rainbow Electronics MAX1587A User Manual
Page 3
MAX1586A/MAX1586B/MAX1587A
High-Efficiency, Low-I
Q
PMICs with
Dynamic Core for PDAs and Smart Phones
_______________________________________________________________________________________
3
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
I
LX1
= -180mA
0.18
0.3
P-Channel On-Resistance
I
LX1
= -180mA, V
PV1
= 2.6V
0.21
0.35
Ω
I
LX1
= 180mA
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
mV
I
LX2
= -180mA
0.225
0.375
P-Channel On-Resistance
I
LX2
= -180mA, VPV2 = 2.6V
0.26
0.425
Ω
I
LX2
= 180mA
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.)