MAX1686 Maxim, MAX1686 Datasheet - Page 3

• Manufacturer Part Number: MAX1686
• Description: Step-Up DC-DC Converters with Precise / Adaptive Current Limit for GSM
• Manufacturer: Maxim

ELECTRICAL CHARACTERISTICS
(V
(Note 1)
Note 1: Specifications to -40°C are guaranteed by design, not production tested.
(V
Input Voltage Range
Input Undervoltage Lockout
Output Voltage Range
Input Supply Current
Shutdown Delay
Reference Voltage
FB Set Voltage
FB Transconductance
Peak Current
Ripple Current
Sense Resistor
ON Input Low Voltage
ON Input High Voltage
N-Channel On-Resistance
P-Channel On-Resistance
Precharge On-Resistance
IN
IN
= V
= +3.3V, V
95
90
85
80
75
70
65
60
ON
0
EFFICIENCY vs. DC LOAD CURRENT
PARAMETER
V
= +3V, V
IN
50
= 5V
V
IN
OUT
V
= 3.3V
100
IN
LOAD CURRENT (mA)
(V
= 2.7V
LIM
= 5V, V
OUT
_______________________________________________________________________________________
150
V
Precise, Adaptive Current Limit for GSM
IN
= 1V (MAX1687), V
= 5.5V)
= 6V
200
LIM
250
= 1V, Figures 6b and 7, T
SYMBOL
300
R
T
I
I
RIPPLE
gm
I
DELAY
V
SHDN
SENSE
PEAK
V
V
I
REF
IN
IH
IL
350
FB
CHG
Step-Up DC-DC Converters with
= 1V (MAX1688), V
IN rising, 1% hysteresis
V
Shutdown V
V
I
FB rising, 2% hysteresis
V
V
V
V
V
V
V
V
V
V
REF
95
90
85
80
75
70
65
60
FB
OUT
FB
LIM
LIM
LIM
IN
IN
IN
IN
IN
IN
= 2.7V
= 6V
= 4.2V
= 2.7V
= 2.7V
= 4V, V
= 1.5V
= 1.125V, V
0
= 0 to 10µA
= V
= V
= V
= 0, ON = GND
EFFICIENCY vs. GSM BURST LOAD
CHG
CHG
CHG
500
A
V
IN
FB
= +25°C, unless otherwise noted.)
V
IN
IN
= 5V
V
= 1V
= 0.65V
= 1V
= 3.3V
IN
LOAD CURRENT (mA)
= 0, V
1000
= 4.2V, LX2 connected to LX1,
(V
= 2.7V
CONDITIONS
OUT
OUT
FB
V
1500
IN
OUT
= 5.5V)
= 3V (MAX1688)
= 1.5V, V
= 6V
Typical Operating Characteristics
= 0
2000
OUT
2500
= 6V, T
3000
A
= -40°C to +85°C, unless otherwise noted.)
100
95
90
85
80
75
70
65
60
0
1.212
V
2.35
1.20
0.16
0.73
0.44
MIN
145
2.7
0.6
1.8
1.5
REF
EFFICIENCY vs. LOAD CURRENT
50
(V
IN
100
= 2.7V, V
LOAD CURRENT (mA)
TYP
150
OUT
200
1.288
MAX
1.30
0.24
0.90
0.57
0.18
2.65
240
0.6
0.8
0.7
= 3.3V)
10
70
6
5
2
6
250
300
UNITS
mmho
mA
mA
µA
ms
A
Ω
Ω
Ω
Ω
V
V
V
V
V
V
V
350
3