Datasheet

TPS5103
MULTIPLE MODE SYNCHRONOUS DC/DC CONTROLLER
SLVS240A – SEPTEMBER 1999 – REVISED MAY 2001
34
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION
Table 4. Test Specifications
PARAMETER CONDITIONS MIN TYP MAX UNITS
Input voltage range, V
I
5 25 V
Output voltage range, V
O
V
I
= 5 – 25 V, I
O
= 0 – 4 A 1.7 1.8 1.9 V
Output current range, I
O
V
I
= 5 – 10 V 0 4 A
Output current limit V
I
= 5 V 4.3 A
Output ripple V
I
= 5 V, I
O
= 4 A 50 mVp–p
Operating frequency, f I
O
= 4 A 150 250 kHz
Efficiency V
I
= 5 V, V
O
= 1.8 V, I
O
= 4 A 90 %
Table 5. EVM Operating Specifications
SKIP MODE HYS MODE
Remove JP1 shunt Remove R5, C6, and C7
Remove R6A
Add R6B
Add C15
If it needs the loop compensation, add R2 and C4
This EVM is designed to cover as many applications as possible. For more specific applications, the circuit can
be simpler. Table 6 gives some recommendations.
Table 6. EVM Application Recommendations
5-V INPUT VOLTAGE <3-A OUTPUT CURRENT DIODE VERSION
Change C1 to low-profile capacitor
Sanyo 10TPB220M (220 µF, 10 V) or 6TPB330M
(330 µF, 6.3 V)
Change Q1 and Q2 to dual-pack MOSFET,
IRF7311 to reduce the cost
Remove Q2 to reduce the cost
Remove R10
Table 7. Vendor and Source Information
MATERIAL SOURCE PART NUMBER DISTRIBUTORS
MOSFETS (Q1 Q2)
In EVM design Si4410
Local distributor
MOSFETS
(Q1
–
Q2)
Second source IRF7811 (International Rectifier)
Local
distributor
In
p
ut ca
p
acitors (C1)
In EVM design RV–35V221MH10–R (ELNA) Bell Microproducts 972–783–4191
Input
capacitors
(C1)
Second source 35CV330AX/GX (Sanyo) 870–633–5030
UUR1V221MNR1GS (Nichicon) Future Electronics (Local Office)
Main diodes (D1) In EVM design MBRS340T3 (Motorola) Local distributors
Second source U3FWJ44N (Toshiba) Local distributors
Inductors (L1) In EVM design DO3316P–682 (Coilcraft) 972–458–2645
Second source
CTDO3316P–682
(Inductor Warehouse)
800–533–8295
Ceramic capacitors
(C2, C14) (C12, C10)
In EVM design
GMK325F106ZH
GMK316F225ZG
(Taiyo Yuden)
SMEC
512–331–1877
Taiyo Yuden email: [e-mail]