OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

MAX1627ESA

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
MAX1626/MAX1627
5V/3.3V or Adjustable, 100% Duty-Cycle,
High-Efficiency, Step-Down DC-DC Controllers
4 _______________________________________________________________________________________
____________________________Typical Operating Characteristics (continued)
(Circuit of Figure 1, T
A
= +25°C, unless otherwise noted.)
0
-60
-40
MAX1626 SHUTDOWN CURRENT
vs. TEMPERATURE
MAX1626-04
TEMPERATURE (°C)
SHUTDOWN CURRENT (µA)
0.1
0.3
0.2
0.5
0.4
0.6
0.7
0.8
-20 0 20
40
60 80 100 120
140
E
C
B
A
D
APPLICATION CIRCUIT
SHUTDOWN CURRENT:
A: V+ = +15V
B: V+ = +10V
C: V+ = +4V
MAX1626 SHUTDOWN
CURRENT:
D: V+ = +16V
E: V+ = +4V
400
0
0 2000 4000
EXT RISE AND FALL TIMES
vs. CAPACITANCE
50
100
300
250
350
MAX1626-10
CAPACITANCE (pF)
t
RISE
AND t
FALL
(ns)
200
150
t
RISE
, V+ = +15V
t
FALL
, V+ = +5V
t
RISE
, V+ = +5V
t
FALL
, V+ = +15V
50
0
-60 -40 -20 40 60 140
EXT RISE AND FALL TIMES
vs. TEMPERATURE
10
5
15
40
35
45
MAX1626-09
TEMPERATURE (°C)
t
RISE
AND t
FALL
(ns)
0
20 80
25
20
30
100 120
t
FALL
, V+ = +5V
C
EXT
= 1nF
3/5 = 0V
OUT = 50kHz, 0.3Vp-p
,
3.3V
DC
t
RISE
, V+ = +5V
t
RISE
, t
FALL
, V+ = +15V
60
-60
-40
MAX1626
V+ QUIESCENT CURRENT
vs. TEMPERATURE
MAX1626-01
TEMPERATURE (°C)
I
Q
(µA)
62
64
66
68
70
72
-20 0 20
40
60 80 100 120
140
3/5 = 0V
OUT FORCED TO 3.4V
V+ = +16V
V+ = +10V
V+ = +4V
12
0
012345
MAX1626 EXT OFF TIME
vs. OUTPUT VOLTAGE
2
8
10
MAX1626-02
OUTPUT VOLTAGE (V)
EXT OFF TIME (µs)
6
4
V+ = +5V
3/5 = GND
3/5 = V+
12
0
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
MAX1627 EXT OFF TIME
vs. FB PIN VOLTAGE
2
8
10
MAX1626-03
FB PIN VOLTAGE (V)
EXT OFF TIME (µs)
6
4
V+ = +5V
115
85
-60 -40 -20 0 20 40 60 80 100 120 140
CS TRIP LEVEL vs. TEMPERATURE
90
105
110
MAX1626-12
TEMPERATURE (°C)
CS TRIP LEVEL (mV)
100
95
OUT = 0V
MAX1626/MAX1627
5V/3.3V or Adjustable, 100% Duty-Cycle,
High-Efficiency, Step-Down DC-DC Controllers
_______________________________________________________________________________________
5
1.310
1.280
-60 -40 -20 0 20 40 60 80 100 120 140
REFERENCE OUTPUT VOLTAGE
vs. TEMPERATURE
1.285
1.300
1.305
MAX1626-13
TEMPERATURE (°C)
REFERENCE OUTPUT VOLTAGE (V)
1.295
1.290
I
REF
= 10µA
I
REF
= 0µA
I
REF
= 50µA
I
REF
= 100µA
100µs/div
MAX1626 LOAD-TRANSIENT RESPONSE
MAX1626-15
V+ = 8V, V
OUT
= 3.3V, LOAD = 30mA to 2A
A: OUT, 50mV/div, 3.3V DC OFFSET
B: LOAD CURRENT, 1A/div
B
A
5ms/div
MAX1626 LINE-TRANSIENT RESPONSE
MAX1626-16
V
OUT
= 5V, LOAD = 1A, C
IN
= 33µF
A: OUT, 100mV/div, 5V DC OFFSET
B: V+ 6V to 12V, 2V/div
B
A
5ms/div
LINE-TRANSIENT RESPONSE
FROM 100% DUTY CYCLE
MAX1626-17
V
OUT
= 3.3V, LOAD = 1A, C
IN
= 47µF
A: OUT, 100mV/div, 3.3V DC OFFSET
B: V+ 3.3V to 15V, 5V/div
B
A
____________________________Typical Operating Characteristics (continued)
(Circuit of Figure 1, T
A
= +25°C, unless otherwise noted.)
500µs/div
MAX1626 SHUTDOWN RESPONSE TIME
AND SUPPLY CURRENT
MAX1626-14
V+ = 8V, V
OUT
= 5V, LOAD = 1A
A: OUT, 2V/div
B: SUPPLY CURRENT, 1A/div
C: SHDN, 5V/div
B
C
A
MAX1626/MAX1627
5V/3.3V or Adjustable, 100% Duty-Cycle,
High-Efficiency, Step-Down DC-DC Controllers
6 _______________________________________________________________________________________
______________________________________________________________Pin Description
Ground88
1.3V Reference Output. Can source 100µA. Bypass with 0.1µF.44
Positive Supply Input. Bypass with 0.47µF.55
Current-Sense Input. Connect current-sense resistor between V+ and CS. External
MOSFET is turned off when the voltage across the resistor equals the current-limit
trip level (around 100mV).
66
Gate Drive for External P-Channel MOSFET. EXT swings between V+ and GND.77
Active-High Shutdown Input. Device is placed in shutdown when SHDN is driven
high. In shutdown mode, the reference, output, and external MOSFET are turned off.
Connect to GND for normal operation.
33
3.3V or 5V Selection. Output voltage is set to 3.3V when this pin is low or 5V when it
is high.
—2
Feedback Input for adjustable-output operation. Connect to an external voltage
divider between the output and GND (see the
Setting the Output Voltage
section).
2—
Sense input for fixed 5V or 3.3V output operation. OUT is internally connected to an
on-chip voltage divider (MAX1626). It does not supply current. Leave OUT uncon-
nected during adjustable-output operation (MAX1627).
11
GND
REF
V+
CS
EXT
SHDN
3/5
FB
OUT
MAX1626
C5
0.47µF
P
D1
R
SENSE
0.04Ω
U1 
LOGIC-LEVEL MOSFET
C4
0.1µF
3/5
SHDN
REF
V+
EXT
CS
GND
OUT
INPUT
L1 
22µH, 3A
C1
220µF
LOW-ESR
TANTALUM
C2
68µF LOW-ESR
TANTALUM
C3
68µF LOW-ESR
TANTALUM
L1: SUMIDA CDRH125-220
D1: NIHON NSQ03A03
U1: MORTOLA MMSF3PO2HD
OUTPUT
Figure 1. MAX1626 Typical Operating Circuit
MAX1626
MAX1627
MINIMUM ON-TIME
ONE-SHOT
S
OUT
(FB)
3/5
R3
R2
R1
SHDN
V+
CS
R
TRIG
Q
Q
MINIMUM OFF-TIME
ONE-SHOT
CURRENT-SENSE
COMPARATOR
ERROR
COMPARATOR
REF
1.5V
EXT REF
( ) MAX1627 ONLY
MAX1626 ONLY
TRIG
Q
Figure 2. Simplified Functional Diagram
PIN
MAX1626
FUNCTION
MAX1627
NAME
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

MAX1627ESA

Mfr. #:
Buy MAX1627ESA
Manufacturer:
Description:
Switching Controllers 5/3.3V or Adjustable 100% Duty Cycle
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet