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MAX1687ESA Datasheet(PDF) 3 Page - Maxim Integrated Products

Part # MAX1687ESA
Description  Step-Up DC-DC Converters with Precise, Adaptive Current Limit for GSM
PDF  12 Pages
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX1687ESA Datasheet(HTML) 3 Page - Maxim Integrated Products

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



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