Rainbow Electronics MAX1587A - Manual (Page 7)

MAX1586A/MAX1586B/MAX1587A
High-Efficiency, Low-I
Q
PMICs with
Dynamic Core for PDAs and Smart Phones
_______________________________________________________________________________________ 7
PARAMETER CONDITIONS MIN MAX UNITS
SYNCHRONOUS-BUCK PWM REG3
REG3 from 1.3V to 1.475V, 2.6V
≤
V PV3_
≤
5.5V,
load = 0 to 500mA
-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
%
I LX3 = -180mA 0.375
P-Channel On-Resistance
I LX2 = -180mA, V PV3 = 2.6V 0.425
Ω
I LX3 = 180mA 0.25
N-Channel On-Resistance
I LX3 = 180mA, V PV3 = 2.6V 0.275
Ω
P-Channel Current-Limit Threshold -0.60 +0.85 A
OUT3 Maximum Output Current 2.6V
≤
V PV3_
≤
5.5V (Note 3) 0.4 A
LX3 Leakage Current V PV3 = 5.5V, LX3 = GND or PV2, V ON3 = 0V -10 +10 µA
LDOs V4, V5, V6, V1 SLEEP, V2 SLEEP, AND V7 OUTPUT
V4, V5, V6, V1 SLEEP, V2 SLEEP
Output Current
35 mA
V7 Output Current 30 mA
REG4 Output Voltage Load = 0.1mA to 35mA 1.254 1.346 V
REG5 Output Voltage Load = 0.1mA to 35mA 1.061 1.139 V
IN45, IN6 Input Voltage Range 2.4 5.5 V
1.8V setting, load = 0.1mA to 35mA 1.737 1.863
2.5V setting, load = 0.1mA to 35mA 2.412 2.588
REG6 Output Voltage (POR Default
to 0V, Set by Serial Input)
MAX1586
3.0V setting, load = 0.1mA to 35mA 2.895 3.105
V
V1 and V2 SLEEP Output Voltage
Accuracy
Set to same output voltage as REG1 and REG2 -3.5 +3.5 %
V1 and V2 SLEEP Dropout Voltage Load = 20mA 150 mV
V6 Dropout Voltage M AX 1586 3V m od e, l oad = 30m A; 2.5V m od e, l oad = 30m A 200 mV
V7 Switch Voltage Drop Load = 20mA, V BKBT = V V1 = 3.0V 200 mV
V4, V5, V6 Output Current Limit 40 mA
BKBT Leakage 1 µA
OSCILLATOR
PWM Switching Frequency 0.93 1.07 MHz
SUPERVISORY/MANAGEMENT FUNCTIONS
Rising 92 97
POK Trip Threshold (Note 4)
Falling 88.5 92.5
%
LBI = IN (for preset) 3.51 3.69
LBI Threshold (Falling)
MAX1586,
hysteresis is 5% (typ)
With resistors at LBI 0.98 1.02
V
DBI = IN (for preset) 2.993 3.307
DBI Threshold (Falling)
MAX1586,
hysteresis is 5% (typ)
With resistors at LBI 1.208 1.256
V
RSO Threshold (Falling) Voltage on REG7, hysteresis is 5% (typ) 2.25 2.60 V
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 = -40°C to +85°C, unless otherwise noted.) (Note 5)