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A6902D13TR

P1-P3P4-P6P7-P9P10-P12
Pin connection A6902D
4/12 Doc ID 13959 Rev 5
2 Pin connection
2.1 Pin connection
Figure 2. Pin connection (top view)
2.2 Pin description
Table 1. Pin description
N° Pin Description
1 OUT Regulator output.
2 CS+ Current error amplifier input (current sense at higher voltage)
3 CS- Current error amplifier input (current sense at lower voltage)
4 COMP E/A output for frequency compensation.
5FB
Feedback input. Connecting directly to this pin results in an output
voltage of 1.23 V. An extenal resistive divider is required for higher
output voltages.
6V
REF
3.3 V reference voltage. No cap is need for stability.
7 GND Ground.
8 VCC Unregulated DC input voltage.
A6902D Electrical data
Doc ID 13959 Rev 5 5/12
3 Electrical data
3.1 Maximum ratings
3.2 Thermal data
Table 2. Absolute maximum ratings
Symbol Parameter Value Unit
V
8
Input voltage 40 V
V
1
OUT pin DC voltage
OUT pin peak voltage at Δt = 0.1 μs
-1 to 40
-5 to 40
V
V
I
1
Maximum output current int. limit.
V
4
, V
5
Analog pins 4 V
V
2
, V
3
Analog pins -0.3 to V
CC
V
P
TOT
Power dissipation at T
A
≤ 70 °C 0.7 W
T
J
Operating junction temperature range -40 to 150 °C
T
STG
Storage temperature range -55 to 150 °C
Table 3. Thermal data
Symbol Parameter SO8 Unit
R
thJA
Maximum thermal resistance junction-ambient 110
(1)
1. Package mounted on board
°C/W
Electrical characteristics A6902D
6/12 Doc ID 13959 Rev 5
4 Electrical characteristics
T
J
= -40 to 125 °C, V
CC
= 12 V, unless otherwise specified
Table 4. Electrical characteristics
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
CC
Operating input
voltage range
V
0
= 1.235 V; I
0
= 2 A 8 36 V
R
DS(on)
MOSFET on
resistance
0.250 0.5 Ω
I
L
Maximum limiting
current
(1)
V
CC
= 8.5 V 1.8 2.5 3.2
A
V
CC
= 8.5 V, T
J
= 25 °C 2 2.5 3.2
f
SW
Switching frequency 212 250 280 kHz
Duty cycle 0 100 %
Dynamic characteristics (see test circuit)
V
5
Voltage feedback
8 V < V
CC
< 36 V,
20 mA < I
0
< 1 A
1.198 1.235 1.272 V
η Efficiency V
0
= 5 V, V
CC
= 12 V 90 %
DC characteristics
I
qop
Total operating
quiescent current
35mA
I
q
Quiescent current Duty cycle = 0; V
FB
= 1.5 V 2.7 mA
Error amplifier
V
OH
High level output
voltage
V
FB
=1 V 3.6 V
V
OL
Low level output
voltage
V
FB
=1.5 V 0.4 V
I
o source
Source output current
V
COMP
= 1.9 V;
V
FB
= 1 V
160 300 μA
I
o sink
Sink output current
V
COMP
= 1.9 V;
V
FB
= 1.5 V
11.5 mA
I
b
Source bias current 2.5 4 μA
DC open loop gain R
L= 50 58 dB
gm Transconductance
I
COMP
= -0.1 mA to 0.1 mA;
V
COMP
= 1.9 V
2.3 mS
V
OFFS
Input offset voltage
V
CS-
= 1.8 V;
V
CS+
= V
comp
90 100 110 mV
I
CS+
CS+ output current
I
0
=1 A; R
SENSE
=100 mΩ;
V
OUT
< V
CC
-2 V
1.5 3 μA
I
CS-
CS- output current
I
0
=1A; R
SENSE
=100 mΩ;
V
OUT
< V
CC
-2 V
1.5 3 μA
8
P1-P3P4-P6P7-P9P10-P12

A6902D13TR

Mfr. #:
Buy A6902D13TR
Manufacturer:
STMicroelectronics
Description:
Switching Voltage Regulators 1A Step Down REG 250mOhm Adjustable
Lifecycle:
New from this manufacturer.
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